def compute_gcd(x,y):

    while(y):
        x, y = y, x % y
    return x

def compute_lcm(x,y):
    lcm = (x*y)//compute_gcd(x,y)
    return lcm

num1 = 12
num2 = 20
print("The L.C.M is", compute_lcm(num1, num2))