Let's get this math done. We have 412 and we're going to multiply it by 10. This is the same as taking 412 and adding it to itself 10 times.
Step 1: 0 + 412 = 412
Step 2: 412 + 412 = 824
Step 3: 824 + 412 = 1236
Step 4: 1236 + 412 = 1648
Step 5: 1648 + 412 = 2060
Step 6: 2060 + 412 = 2472
Step 7: 2472 + 412 = 2884
Step 8: 2884 + 412 = 3296
Step 9: 3296 + 412 = 3708
Step 10: 3708 + 412 = 4120

So, 412*10 = 4120