OK, let's crack this. We're given 140 and our task is to multiply it by 7. Essentially, we'll be adding 140 to itself 7 times.
Step 1: 0 + 140 = 140
Step 2: 140 + 140 = 280
Step 3: 280 + 140 = 420
Step 4: 420 + 140 = 560
Step 5: 560 + 140 = 700
Step 6: 700 + 140 = 840
Step 7: 840 + 140 = 980

So, 140*7 = 980