Here

def force(m1, m2, r):
    g = 6.673*(10**-8)
    f = (g*m1*m2)/(r**2)
    return (f)


def inputs():
    m1 = float(input("Please enter the first number: "))
    m2 = float(input("Please enter the second number: "))
    r = float(input("Please enter the distance: "))
    print("The Gravitional Force is: ", force(m1, m2, r))
    inputs()
inputs()