Calculate circumference and area of a square from its diameter

void setup()

{

    size(500, 500);

    int w = 300; //กว้าง

    int l = 300; //ยาว

    float as; //Area of square

    float ls; //Line of square

    as= w*l; //สูตรหาพื้นที่

    ls= (2*w)+(2*l); //สูตรหาเส้นรอบรูป

    println("Value of as = "+as);

    println("Value of ls = "+ls);

    rect(105, 105, w, l);

    fill(0);

    textSize(15);

    text("Area = 90000", 150, 240);

    text("Circumference of square = 1200", 150, 270);

    }