OK, let's crack this. We're given 829 and our task is to multiply it by 10. Essentially, we'll be adding 829 to itself 10 times.
Step 1: 0 + 829 = 829
Step 2: 829 + 829 = 1658
Step 3: 1658 + 829 = 2487
Step 4: 2487 + 829 = 3316
Step 5: 3316 + 829 = 4145
Step 6: 4145 + 829 = 4974
Step 7: 4974 + 829 = 5803
Step 8: 5803 + 829 = 6632
Step 9: 6632 + 829 = 7461
Step 10: 7461 + 829 = 8290

So, 829*10 = 8290