OK, let's work through this together. We're starting with 758 and we're going to multiply it by 3, which means we add 758 to itself 3 times.
Step 1: 0 + 758 = 758
Step 2: 758 + 758 = 1516
Step 3: 1516 + 758 = 2274

So, 758*3 = 2274