Alright, let's solve this math problem step by step. First, we have the number 479. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 21. So, we're going to take the number 479 and add it to itself 21 times.
Step 1: 0 + 479 = 479
Step 2: 479 + 479 = 958
Step 3: 958 + 479 = 1437
Step 4: 1437 + 479 = 1916
Step 5: 1916 + 479 = 2395
Step 6: 2395 + 479 = 2874
Step 7: 2874 + 479 = 3353
Step 8: 3353 + 479 = 3832
Step 9: 3832 + 479 = 4311
Step 10: 4311 + 479 = 4790
Step 11: 4790 + 479 = 5269
Step 12: 5269 + 479 = 5748
Step 13: 5748 + 479 = 6227
Step 14: 6227 + 479 = 6706
Step 15: 6706 + 479 = 7185
Step 16: 7185 + 479 = 7664
Step 17: 7664 + 479 = 8143
Step 18: 8143 + 479 = 8622
Step 19: 8622 + 479 = 9101
Step 20: 9101 + 479 = 9580
Step 21: 9580 + 479 = 10059

So, 479*21 = 10059