OK, let's work through this together. We're starting with 109 and we're going to multiply it by 7, which means we add 109 to itself 7 times.
Step 1: 0 + 109 = 109
Step 2: 109 + 109 = 218
Step 3: 218 + 109 = 327
Step 4: 327 + 109 = 436
Step 5: 436 + 109 = 545
Step 6: 545 + 109 = 654
Step 7: 654 + 109 = 763

So, 109*7 = 763