How to do a calculation on Python with a random operator

I am making a maths test where each question will be either adding, multiplying or subtracting randomly chosen numbers. My operator will be chosen at random, however I cannot work out how to calculate with the operator. My problem is here:

answer = input()
if answer ==(number1,operator,number2):
    print('Correct')

How can I make it so the operator is used in a calculation. For example, if the random numbers were two and five, and the random operator was '+', how would I code my program so that it would end up actually doing the calculation and getting an answer, so in this case it would be:

answer =input()
if answer == 10:
    print('Correct')

Basically, how can I do a calculation to check to see if the answer is actually correct? My full code is below.

import random
score = 0 #score of user
questions = 0 #number of questions asked
operator = ["+","-","*"]
number1 = random.randint(1,20)
number2 = random.randint(1,20)
print("You have now reached the next level!This is a test of your addition and subtraction")
print("You will now be asked ten random questions")
while questions<10: #while I have asked less than ten questions
    operator = random.choice(operator)
    question = '{} {} {}'.format(number1, operator, number2)
    print("What is " + str(number1) +str(operator) +str(number2), "?")
    answer = input()
    if answer ==(number1,operator,number2): 
        print("You are correct")
        score =score+1
    else:
        print("incorrect")

Sorry if I have been unclear, thanks in advance