Without delay, let's solve this. We've got 66 and we will be multiplying it by 6, that is, adding 66 to itself 6 times.
Step 1: 0 + 66 = 66
Step 2: 66 + 66 = 132
Step 3: 132 + 66 = 198
Step 4: 198 + 66 = 264
Step 5: 264 + 66 = 330
Step 6: 330 + 66 = 396

So, 66*6 = 396