OK, let's work through this together. We're starting with 386 and we're going to multiply it by 3, which means we add 386 to itself 3 times.
Step 1: 0 + 386 = 386
Step 2: 386 + 386 = 772
Step 3: 772 + 386 = 1158

So, 386*3 = 1158