OK, let's crack this. We're given 159 and our task is to multiply it by 6. Essentially, we'll be adding 159 to itself 6 times.
Step 1: 0 + 159 = 159
Step 2: 159 + 159 = 318
Step 3: 318 + 159 = 477
Step 4: 477 + 159 = 636
Step 5: 636 + 159 = 795
Step 6: 795 + 159 = 954

So, 159*6 = 954