Help with Python string multiplying

#This is where the import commands go
    from random import randint
    import random
     
    #This is a set list of variables for each question (21 in total as 2 for each question and operation)
    
    operations = ['x', '-', '+']
    operation = random.choice(operations)
    number1 = random.randrange(0,10)
    number2 = random.randrange(0,10)
    
    
    #This variable stores the users score and the correct answer for each question
    score = 0
    answer = None
    numberofquestions = 0
    
    
    
    """ THIS IS OLD CODE ********** IGNORE OLD CODE***********
    #This changes the randomly generated numbers into strings, then evauates them as maths equations so it knows the answers.
    #Also it stores the whole of each question as a variable, making it easier to code.
    question1 = eval(str(q1p1) + operation + str(q1p2))
    THIS IS OLD CODE ********** IGNORE OLD CODE***********"""
    
    
    
    #This asks for the user’s name
    
    name = input("What is your forename (With No Caps?)")
    surname = input("What is your surname (With No Caps?)")
    
    
    #This prints a welcome message, personalised with the user's name
    
    print("Welcome to your test," + name)
    
    
    #Information about how to answer questions
    
    print('''Throughout your test you will be asked a series of questions.
    These questions will be randomly generated and are designed to test your basic arithmetic skills.
    Please enter your answers in integer form.
    EG. if the question was 5 + 5, you would enter 10 with no spaces or extra characters.''')
    
    
    
    #First question
    while numberofquestions <10:
    	operations = ['x', '-', '+']
    	operation = random.choice(operations)
    	number1 = random.randrange(0,10)
    	number2 = random.randrange(0,10)
    	if operation == '+':
    		answer = number1 + number2
    	elif operation == '-':
    		answer = number1 - number2
    	elif operation == 'x':
    		answer = number1 * number2
    	user_answer = input("What is " + str(number1) + " " + operation + " " + str(number2) + "?")
    	user_answer = float(user_answer)
    	if user_answer == answer:
    		print("Well Done! You got it correct!")
    		score = score+1
    	else:
    		print("Sorry you got that wrong")
    	print ("***********-*-*-*-Your score so far is-*-*-*-*********** ")
    	print (score)
    	numberofquestions = numberofquestions+1
    print ("Well done, you have completed your test! Your final score was...")
    print (score)
    score = score * 10
    
    print ("Your score as a percentage is," +str(score))