Sure thing, let's get straight to it. We start with 657 and we're going to multiply it by 6, which means adding 657 to itself 6 times.
Step 1: 0 + 657 = 657
Step 2: 657 + 657 = 1314
Step 3: 1314 + 657 = 1971
Step 4: 1971 + 657 = 2628
Step 5: 2628 + 657 = 3285
Step 6: 3285 + 657 = 3942

So, 657*6 = 3942