Random occasions the program adds 89 to the result after multipling

[palatinb]

Short description	If a number generated by a random generator is 89 it is added to the multiplied number
Expected operation	Simply multiply the two entered number
Experienced operation	Random occasions 89 is added to the multiplied result
Reproductive steps	After running several times the mul operation it can be reproduced the error
Error location	test-automation-engineer-python-junior/calculator.py Lines 18 to 20 in 865c772 e = random.randrange(100) if e == 89: return a * b + e
Test result	If it does not add 89 it is OK else Not OK
Priority	Mid