OK, let's work through this together. We're starting with 156 and we're going to multiply it by 7, which means we add 156 to itself 7 times.
Step 1: 0 + 156 = 156
Step 2: 156 + 156 = 312
Step 3: 312 + 156 = 468
Step 4: 468 + 156 = 624
Step 5: 624 + 156 = 780
Step 6: 780 + 156 = 936
Step 7: 936 + 156 = 1092

So, 156*7 = 1092