def jisuan(num1,num2):
    result = (num1-num2)/num2
    print(result)


def mi(a1,a2,a3):
    end_result = a1*(a2**a3)
    print(end_result)

if __name__ == "__main__":                  #
    jisuan(279.47,285.49)
    mi(10,0.9,9)





