diff --git a/Java Classes & Interfaces/New Calc Engine/src/CalculateBase.java b/Java Classes & Interfaces/New Calc Engine/src/CalculateBase.java
new file mode 100644
index 0000000..87a8515
--- /dev/null
+++ b/Java Classes & Interfaces/New Calc Engine/src/CalculateBase.java	
@@ -0,0 +1,43 @@
+public abstract class CalculateBase {
+    private double leftVal;
+    private double rightVal;
+    private double result;
+
+    public abstract void calculate();
+
+    public CalculateBase() {}
+    
+    public CalculateBase(double leftVal, double rightVal) {
+        this.leftVal = leftVal;
+        this.rightVal = rightVal;
+    }
+
+    // Getters and setters
+    public double getLeftVal() {
+        return leftVal;
+    }
+
+    public void setLeftVal(double leftVal) {
+        this.leftVal = leftVal;
+    }
+
+    public double getRightVal() {
+        return rightVal;
+    }
+
+    public void setRightVal(double rightVal) {
+        this.rightVal = rightVal;
+    }
+
+    public double getResult() {
+        return result;
+    }
+
+    public void setResult(double result) {
+        this.result = result;
+    }
+
+    
+
+    
+}