Sure thing, let's get straight to it. We start with 901 and we're going to multiply it by 3, which means adding 901 to itself 3 times.
Step 1: 0 + 901 = 901
Step 2: 901 + 901 = 1802
Step 3: 1802 + 901 = 2703

So, 901*3 = 2703