Alright, let's solve this math problem step by step. First, we have the number 409. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 84. So, we're going to take the number 409 and add it to itself 84 times.
Step 1: 0 + 409 = 409
Step 2: 409 + 409 = 818
Step 3: 818 + 409 = 1227
Step 4: 1227 + 409 = 1636
Step 5: 1636 + 409 = 2045
Step 6: 2045 + 409 = 2454
Step 7: 2454 + 409 = 2863
Step 8: 2863 + 409 = 3272
Step 9: 3272 + 409 = 3681
Step 10: 3681 + 409 = 4090
Step 11: 4090 + 409 = 4499
Step 12: 4499 + 409 = 4908
Step 13: 4908 + 409 = 5317
Step 14: 5317 + 409 = 5726
Step 15: 5726 + 409 = 6135
Step 16: 6135 + 409 = 6544
Step 17: 6544 + 409 = 6953
Step 18: 6953 + 409 = 7362
Step 19: 7362 + 409 = 7771
Step 20: 7771 + 409 = 8180
Step 21: 8180 + 409 = 8589
Step 22: 8589 + 409 = 8998
Step 23: 8998 + 409 = 9407
Step 24: 9407 + 409 = 9816
Step 25: 9816 + 409 = 10225
Step 26: 10225 + 409 = 10634
Step 27: 10634 + 409 = 11043
Step 28: 11043 + 409 = 11452
Step 29: 11452 + 409 = 11861
Step 30: 11861 + 409 = 12270
Step 31: 12270 + 409 = 12679
Step 32: 12679 + 409 = 13088
Step 33: 13088 + 409 = 13497
Step 34: 13497 + 409 = 13906
Step 35: 13906 + 409 = 14315
Step 36: 14315 + 409 = 14724
Step 37: 14724 + 409 = 15133
Step 38: 15133 + 409 = 15542
Step 39: 15542 + 409 = 15951
Step 40: 15951 + 409 = 16360
Step 41: 16360 + 409 = 16769
Step 42: 16769 + 409 = 17178
Step 43: 17178 + 409 = 17587
Step 44: 17587 + 409 = 17996
Step 45: 17996 + 409 = 18405
Step 46: 18405 + 409 = 18814
Step 47: 18814 + 409 = 19223
Step 48: 19223 + 409 = 19632
Step 49: 19632 + 409 = 20041
Step 50: 20041 + 409 = 20450
Step 51: 20450 + 409 = 20859
Step 52: 20859 + 409 = 21268
Step 53: 21268 + 409 = 21677
Step 54: 21677 + 409 = 22086
Step 55: 22086 + 409 = 22495
Step 56: 22495 + 409 = 22904
Step 57: 22904 + 409 = 23313
Step 58: 23313 + 409 = 23722
Step 59: 23722 + 409 = 24131
Step 60: 24131 + 409 = 24540
Step 61: 24540 + 409 = 24949
Step 62: 24949 + 409 = 25358
Step 63: 25358 + 409 = 25767
Step 64: 25767 + 409 = 26176
Step 65: 26176 + 409 = 26585
Step 66: 26585 + 409 = 26994
Step 67: 26994 + 409 = 27403
Step 68: 27403 + 409 = 27812
Step 69: 27812 + 409 = 28221
Step 70: 28221 + 409 = 28630
Step 71: 28630 + 409 = 29039
Step 72: 29039 + 409 = 29448
Step 73: 29448 + 409 = 29857
Step 74: 29857 + 409 = 30266
Step 75: 30266 + 409 = 30675
Step 76: 30675 + 409 = 31084
Step 77: 31084 + 409 = 31493
Step 78: 31493 + 409 = 31902
Step 79: 31902 + 409 = 32311
Step 80: 32311 + 409 = 32720
Step 81: 32720 + 409 = 33129
Step 82: 33129 + 409 = 33538
Step 83: 33538 + 409 = 33947
Step 84: 33947 + 409 = 34356

So, 409*84 = 34356