a = input ("this is number 1:")
b = input ("this is number 2:")

def add():
    result = int(a) + int(b)
    return result

x = add()
print (x)

def sub():
    result = int(a) - int(b)
    return result

y = sub()
print(y)

def mul():
    result = int(a) * int(b)
    return result

z = mul()
print(z)

def divide():
    result = float(a) / float(b)
    return result

k = divide()
print(k)
