OK, let's work through this together. We're starting with 785 and we're going to multiply it by 3, which means we add 785 to itself 3 times.
Step 1: 0 + 785 = 785
Step 2: 785 + 785 = 1570
Step 3: 1570 + 785 = 2355

So, 785*3 = 2355