Sure thing! We've got 51 and we're gonna multiply it by 6. That's the same as adding 51 to itself 6 times.
Step 1: 0 + 51 = 51
Step 2: 51 + 51 = 102
Step 3: 102 + 51 = 153
Step 4: 153 + 51 = 204
Step 5: 204 + 51 = 255
Step 6: 255 + 51 = 306

So, 51*6 = 306