OK, let's work through this together. We're starting with 912 and we're going to multiply it by 7, which means we add 912 to itself 7 times.
Step 1: 0 + 912 = 912
Step 2: 912 + 912 = 1824
Step 3: 1824 + 912 = 2736
Step 4: 2736 + 912 = 3648
Step 5: 3648 + 912 = 4560
Step 6: 4560 + 912 = 5472
Step 7: 5472 + 912 = 6384

So, 912*7 = 6384