OK, let's crack this. We're given 499 and our task is to multiply it by 10. Essentially, we'll be adding 499 to itself 10 times.
Step 1: 0 + 499 = 499
Step 2: 499 + 499 = 998
Step 3: 998 + 499 = 1497
Step 4: 1497 + 499 = 1996
Step 5: 1996 + 499 = 2495
Step 6: 2495 + 499 = 2994
Step 7: 2994 + 499 = 3493
Step 8: 3493 + 499 = 3992
Step 9: 3992 + 499 = 4491
Step 10: 4491 + 499 = 4990

So, 499*10 = 4990