CalcSkin/src/main/java/rocks/zipcode/calcskin/CalcEngine.java

package rocks.zipcode.calcskin;

public class CalcEngine {

    CalcEngine() {
    }

    public double add(double v, double v1) { return (v+v1);}

    public double subtract(double v, double v1) { return (v-v1);}

    public double multiply(double v, double v1) { return (v*v1);}

    public double divide(double v, double v1) { return (v/v1);}
}