def area(): #calculate the area of a triangle
    print("Let's caclulate the area of a triangle")
    base = input("What length is the base of the triangle? ")
    height = input("What is the height perpendicular to the base? ")
    b = float(base)
    h = float(height)
    area = b * h /2
    output = str(area)
    print("Area of a triangle with base "+base+" and height "+height+" = "+output)

area()