def calc():
    input1 = input("INPUT1")
    input2 = input("INPUT2")
    if input1 not in "+-*/" and input2 not in "+-*/":
        return (input1,input2)
    if input2 in "+-*/":
        if input2 == "+":
            temp = calc()
            input2 = s(temp[0],temp[1])
        elif input2 == "-":
            temp = calc()
            input2 = mi(temp[0],temp[1])
        elif input2 == "*":
            temp = calc()
            input2 = mu(temp[0],temp[1])
        else:
            temp = calc()
            input2 = d(temp[0],temp[1])
    input3 = input("INPUT3")
    if input3 in "+-*/":
        if input3 == "+":
            temp = calc()
            input3 = s(temp[0],temp[1])
        elif input3 == "-":
            temp = calc()
            input3 = mi(temp[0],temp[1])
        elif input3 == "*":
            temp = calc()
            input3 = mu(temp[0],temp[1])
        else:
            temp = calc()
            input3 = d(temp[0],temp[1])
    if input1 == "+":
        return s(input2,input3)
    elif input1 == "-":
        return mi(input2,input3)
    elif input1 == "*":
        return mu(input2,input3)
    elif input1 == "/":
        return d(input2,input3)

def s(lhs,rhs):
    print(lhs)
    print(rhs)
    return int(lhs) + int(rhs)
def mi(lhs,rhs):
    print(lhs)
    print(rhs)
    return int(lhs) - int(rhs)
def mu(lhs,rhs):
    return int(lhs) * int(rhs)
def d(lhs,rhs):
    return int(lhs) // int(rhs)