OK, let's work through this together. We're starting with 897 and we're going to multiply it by 3, which means we add 897 to itself 3 times.
Step 1: 0 + 897 = 897
Step 2: 897 + 897 = 1794
Step 3: 1794 + 897 = 2691

So, 897*3 = 2691