OK, let's work through this together. We're starting with 622 and we're going to multiply it by 12, which means we add 622 to itself 12 times.
Step 1: 0 + 622 = 622
Step 2: 622 + 622 = 1244
Step 3: 1244 + 622 = 1866
Step 4: 1866 + 622 = 2488
Step 5: 2488 + 622 = 3110
Step 6: 3110 + 622 = 3732
Step 7: 3732 + 622 = 4354
Step 8: 4354 + 622 = 4976
Step 9: 4976 + 622 = 5598
Step 10: 5598 + 622 = 6220
Step 11: 6220 + 622 = 6842
Step 12: 6842 + 622 = 7464

So, 622*12 = 7464