Why this code encounter EOFError?

Question

It encounters no Error in PyCharm but it says here: EOFError: When reading a line.

num_one = int(input("Enter first number: "))
num_two = int(input("Enter second number: "))

if num_one < num_two:
temp = num_one
else:
temp = num_two

while num_one % temp != 0 or num_two % temp != 0:
temp = temp - 1

lcm = (num_one * num_two) / temp

print("GCD of %d and %d is %d" % (num_one, num_two, temp))

print("And their LCM is %d" % lcm)

Answer 1

It works, but the submit pop-up is weird on SoloLearn. To make it work, enter a number, make a new line and enter the second number, then hit submit.

I tried it with

3
7

and got the correct answer, 21.