从模块导入时，Python 3、5 / 2给出2而不是2.5

我在python 3中制作了一个计算器程序，并且已将该程序拆分为模块。我在一个模块中做了一个减法函数，该模块只接受两个数字并用正态/运算符进行除法。但是，它似乎像/从python 2和5/2一样给了我2，而不是2.5。但是，我尝试制作一个新文件，其中所有文件都是print（5/2），这给了我2.5。我尝试重新安装python无济于事。我有最新版本（3.4.3）。我搞砸了还是这是一个错误？

计算器：

import operation
import formula
import time
print("\n")
run = True
while run:
try:
    print("1: Addittion")
    print("2: Subtraction")
    print("3: Multiplication")
    print("4: Division")
    print("5: Advanced")
    print("6: Quit")
    print("\n")

    choice = int(input("What would you like to do? "))
    print("\n")

    if choice == 1:
        operation.add()

    elif choice == 2:
        operation.subtract()

    elif choice == 3:
        operation.multiply()

    elif choice == 4:
        operation.divide()

        try:
            answer = numberA / numberB

        except ZeroDivisionError:
            print("ERROR: DIVIDE BY ZERO")
            print("\n")

        else:
            print("%d / %d = %d" % (numberA, numberB, answer))
            print("\n")

    elif choice == 5:
        print("1: Arithmetic Sequences")
        print("2: Geometric Sequences")
        print("3: Pythagorean Theorem")
        print("4: Median")
        print("5: Go Back")
        print("\n")

        choice = int(input("What would you like to do? "))
        print("\n")

        if choice == 1:
            formula.arithmetic()

        elif choice == 2:
            formula.geometric()

        elif choice == 3:
            formula.pythagorean()

        elif choice == 4:
            operation.median()

        elif choice == 5:
            pass

        else:
            print("ERROR: PLEASE ENTER A VALID OPTION (1-5)")
            print("\n")

    elif choice == 6:
        pass
        time.sleep(3)
        run = False

    else:
        print("ERROR: PLEASE ENTER A VALID OPTION (1-6)")
        print("\n")

except ValueError:
    print("\n")
    print("ERROR: PLEASE ONLY USE NUMBERS")
    print("\n")

模块：

def divide():
numberA = int(input("What is the dividend? "))
numberB = int(input("What is the divisor? "))
print("\n")

try:
    answer = numberA / numberB

except ZeroDivisionError:
    print("ERROR: DIVIDE BY ZERO")
    print("\n")

else:
    print("%d / %d = %d" % (numberA, numberB, answer))
    print("\n")

注意：该模块中实际上还有其他等式（-，x和+），但我没有包括它们，因为我认为您不需要它们。告诉我你是否想看他们