public class Calculator {

    public double computeCuttingStrengthStraightBlades(boolean materialIsSteel, double kParam, int strengthLimit, int thickness, int width)
    {
        if(materialIsSteel)
        {
            return kParam*(110+0.56*strengthLimit)*thickness*width;
        }
        return kParam*0.75*strengthLimit*thickness*width;
    }

    public double computeCuttingStrengthAngledBlades(boolean materialIsSteel, double kParam, int strengthLimit, int width, int bladeAngle)
    {
        double cuttingArea = (0.5*width*width)/(Math.tan(Math.toRadians(bladeAngle)));
        if(materialIsSteel)
        {
            return kParam*(110+0.56*strengthLimit)*cuttingArea;
        }
        return kParam*0.75*strengthLimit*cuttingArea;
    }

    public double computeCuttingStrengthProfileShears(boolean materialIsSteel, double kParam, boolean isRound, int sideLength, int strengthLimit)
    {
        double cuttingArea;
        if(isRound)
        {
            cuttingArea = (Math.PI*sideLength*sideLength)/4.0;
        }
        else
        {
            cuttingArea = sideLength*sideLength;
        }
        if(materialIsSteel)
        {
            return kParam*(110+0.56*strengthLimit)*cuttingArea;
        }
        return kParam*0.75*strengthLimit*cuttingArea;
    }
}