OK, let's crack this. We're given 124 and our task is to multiply it by 7. Essentially, we'll be adding 124 to itself 7 times.
Step 1: 0 + 124 = 124
Step 2: 124 + 124 = 248
Step 3: 248 + 124 = 372
Step 4: 372 + 124 = 496
Step 5: 496 + 124 = 620
Step 6: 620 + 124 = 744
Step 7: 744 + 124 = 868

So, 124*7 = 868