OK, let's work through this together. We're starting with 609 and we're going to multiply it by 3, which means we add 609 to itself 3 times.
Step 1: 0 + 609 = 609
Step 2: 609 + 609 = 1218
Step 3: 1218 + 609 = 1827

So, 609*3 = 1827