Let's get this math done. We have 674 and we're going to multiply it by 10. This is the same as taking 674 and adding it to itself 10 times.
Step 1: 0 + 674 = 674
Step 2: 674 + 674 = 1348
Step 3: 1348 + 674 = 2022
Step 4: 2022 + 674 = 2696
Step 5: 2696 + 674 = 3370
Step 6: 3370 + 674 = 4044
Step 7: 4044 + 674 = 4718
Step 8: 4718 + 674 = 5392
Step 9: 5392 + 674 = 6066
Step 10: 6066 + 674 = 6740

So, 674*10 = 6740