Sure thing, let's get straight to it. We start with 0 and we're going to multiply it by 31, which means adding 0 to itself 31 times.
Step 1: 0 + 0 = 0
Step 2: 0 + 0 = 0
Step 3: 0 + 0 = 0
Step 4: 0 + 0 = 0
Step 5: 0 + 0 = 0
Step 6: 0 + 0 = 0
Step 7: 0 + 0 = 0
Step 8: 0 + 0 = 0
Step 9: 0 + 0 = 0
Step 10: 0 + 0 = 0
Step 11: 0 + 0 = 0
Step 12: 0 + 0 = 0
Step 13: 0 + 0 = 0
Step 14: 0 + 0 = 0
Step 15: 0 + 0 = 0
Step 16: 0 + 0 = 0
Step 17: 0 + 0 = 0
Step 18: 0 + 0 = 0
Step 19: 0 + 0 = 0
Step 20: 0 + 0 = 0
Step 21: 0 + 0 = 0
Step 22: 0 + 0 = 0
Step 23: 0 + 0 = 0
Step 24: 0 + 0 = 0
Step 25: 0 + 0 = 0
Step 26: 0 + 0 = 0
Step 27: 0 + 0 = 0
Step 28: 0 + 0 = 0
Step 29: 0 + 0 = 0
Step 30: 0 + 0 = 0
Step 31: 0 + 0 = 0

So, 0*31 = 0