diff --git a/src/client/inventory/Equip.java b/src/client/inventory/Equip.java
index 82edcbe..861ca2b 100644
--- a/src/client/inventory/Equip.java
+++ b/src/client/inventory/Equip.java
@@ -384,6 +384,7 @@ public class Equip extends Item implements IEquip, Serializable {
     }
 
 
+
     public void setdd(String dd) {
         BigInteger bigInteger = new BigInteger(dd);
         if (bigInteger.compareTo(BigInteger.ZERO) < 0) {
@@ -391,6 +392,41 @@ public class Equip extends Item implements IEquip, Serializable {
         }
         this.dd = dd;
     }
+    public void addDd(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        BigInteger bigIntegerdd = new BigInteger(this.dd);
+        BigInteger add = bigIntegerdd.add(bigIntegernum);
+        if (add.compareTo(BigInteger.ZERO) < 0) {
+            add = BigInteger.ZERO;
+        }
+        this.dd = add.toString();
+    }
+
+    public void multiplyDd(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        BigInteger bigIntegerdd = new BigInteger(this.dd);
+        BigInteger product = bigIntegerdd.multiply(bigIntegernum);
+        if (product.compareTo(BigInteger.ZERO) < 0) {
+            product = BigInteger.ZERO;
+        }
+        this.dd = product.toString();
+    }
+
+    public void divideDd(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        if (bigIntegernum.equals(BigInteger.ZERO)) {
+            throw new ArithmeticException("除数不能为零");
+        }
+        BigInteger bigIntegerdd = new BigInteger(this.dd);
+        BigInteger quotient = bigIntegerdd.divide(bigIntegernum);
+        if (quotient.compareTo(BigInteger.ZERO) < 0) {
+            quotient = BigInteger.ZERO;
+        }
+        this.dd = quotient.toString();
+    }
+
+
+
 
     public void setdb(String db) {
         BigInteger bigInteger = new BigInteger(db);
@@ -407,7 +443,71 @@ public class Equip extends Item implements IEquip, Serializable {
         }
         this.qg = qg;
     }
+    public void addDb(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        BigInteger bigIntegerdb = new BigInteger(this.db);
+        BigInteger add = bigIntegerdb.add(bigIntegernum);
+        if (add.compareTo(BigInteger.ZERO) < 0) {
+            add = BigInteger.ZERO;
+        }
+        this.db = add.toString();
+    }
 
+    public void multiplyDb(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        BigInteger bigIntegerdb = new BigInteger(this.db);
+        BigInteger product = bigIntegerdb.multiply(bigIntegernum);
+        if (product.compareTo(BigInteger.ZERO) < 0) {
+            product = BigInteger.ZERO;
+        }
+        this.db = product.toString();
+    }
+
+    public void divideDb(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        if (bigIntegernum.equals(BigInteger.ZERO)) {
+            throw new ArithmeticException("除数不能为零");
+        }
+        BigInteger bigIntegerdb = new BigInteger(this.db);
+        BigInteger quotient = bigIntegerdb.divide(bigIntegernum);
+        if (quotient.compareTo(BigInteger.ZERO) < 0) {
+            quotient = BigInteger.ZERO;
+        }
+        this.db = quotient.toString();
+    }
+
+    public void addQg(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        BigInteger bigIntegerqg = new BigInteger(this.qg);
+        BigInteger add = bigIntegerqg.add(bigIntegernum);
+        if (add.compareTo(BigInteger.ZERO) < 0) {
+            add = BigInteger.ZERO;
+        }
+        this.qg = add.toString();
+    }
+
+    public void multiplyQg(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        BigInteger bigIntegerqg = new BigInteger(this.qg);
+        BigInteger product = bigIntegerqg.multiply(bigIntegernum);
+        if (product.compareTo(BigInteger.ZERO) < 0) {
+            product = BigInteger.ZERO;
+        }
+        this.qg = product.toString();
+    }
+
+    public void divideQg(String num) {
+        BigInteger bigIntegernum = new BigInteger(num);
+        if (bigIntegernum.equals(BigInteger.ZERO)) {
+            throw new ArithmeticException("除数不能为零");
+        }
+        BigInteger bigIntegerqg = new BigInteger(this.qg);
+        BigInteger quotient = bigIntegerqg.divide(bigIntegernum);
+        if (quotient.compareTo(BigInteger.ZERO) < 0) {
+            quotient = BigInteger.ZERO;
+        }
+        this.qg = quotient.toString();
+    }
 
     public void setUpgradeSlots(final byte upgradeSlots) {
         this.upgradeSlots = upgradeSlots;
diff --git a/src/tools/data/MaplePacketLittleEndianWriter.java b/src/tools/data/MaplePacketLittleEndianWriter.java
index 4b7399f..0911787 100644
--- a/src/tools/data/MaplePacketLittleEndianWriter.java
+++ b/src/tools/data/MaplePacketLittleEndianWriter.java
@@ -106,6 +106,7 @@ public class MaplePacketLittleEndianWriter {
         if (s == null ||s.isEmpty()){
             s = "0";
         }
+
         this.writeShort((int) (short)s.getBytes(StandardCharsets.UTF_8).length);
         this.write(s.getBytes(StandardCharsets.UTF_8));
     }