OK, let's crack this. We're given 505 and our task is to multiply it by 29. Essentially, we'll be adding 505 to itself 29 times.
Step 1: 0 + 505 = 505
Step 2: 505 + 505 = 1010
Step 3: 1010 + 505 = 1515
Step 4: 1515 + 505 = 2020
Step 5: 2020 + 505 = 2525
Step 6: 2525 + 505 = 3030
Step 7: 3030 + 505 = 3535
Step 8: 3535 + 505 = 4040
Step 9: 4040 + 505 = 4545
Step 10: 4545 + 505 = 5050
Step 11: 5050 + 505 = 5555
Step 12: 5555 + 505 = 6060
Step 13: 6060 + 505 = 6565
Step 14: 6565 + 505 = 7070
Step 15: 7070 + 505 = 7575
Step 16: 7575 + 505 = 8080
Step 17: 8080 + 505 = 8585
Step 18: 8585 + 505 = 9090
Step 19: 9090 + 505 = 9595
Step 20: 9595 + 505 = 10100
Step 21: 10100 + 505 = 10605
Step 22: 10605 + 505 = 11110
Step 23: 11110 + 505 = 11615
Step 24: 11615 + 505 = 12120
Step 25: 12120 + 505 = 12625
Step 26: 12625 + 505 = 13130
Step 27: 13130 + 505 = 13635
Step 28: 13635 + 505 = 14140
Step 29: 14140 + 505 = 14645

So, 505*29 = 14645