def kalc (a,b):
    print("The sum :", a+b)
    print("The diffrance :", a-b)
    print("The multipliction:", a*b)
    print("The mode:", a%b)

def area_of_circle(r):
    print("Area of circle:", r*r*3.14)

def area_of_triangle(b,h):
    print("Area of triangle:", 0.5*b*h)


kalc(50, 20)

area_of_circle(20)

area_of_triangle(25,75)
