OK, let's work through this together. We're starting with 449 and we're going to multiply it by 3, which means we add 449 to itself 3 times.
Step 1: 0 + 449 = 449
Step 2: 449 + 449 = 898
Step 3: 898 + 449 = 1347

So, 449*3 = 1347