Let's roll up our sleeves and solve this. We have 415 and we're going to multiply it by 29, essentially adding 415 to itself 29 times.
Step 1: 0 + 415 = 415
Step 2: 415 + 415 = 830
Step 3: 830 + 415 = 1245
Step 4: 1245 + 415 = 1660
Step 5: 1660 + 415 = 2075
Step 6: 2075 + 415 = 2490
Step 7: 2490 + 415 = 2905
Step 8: 2905 + 415 = 3320
Step 9: 3320 + 415 = 3735
Step 10: 3735 + 415 = 4150
Step 11: 4150 + 415 = 4565
Step 12: 4565 + 415 = 4980
Step 13: 4980 + 415 = 5395
Step 14: 5395 + 415 = 5810
Step 15: 5810 + 415 = 6225
Step 16: 6225 + 415 = 6640
Step 17: 6640 + 415 = 7055
Step 18: 7055 + 415 = 7470
Step 19: 7470 + 415 = 7885
Step 20: 7885 + 415 = 8300
Step 21: 8300 + 415 = 8715
Step 22: 8715 + 415 = 9130
Step 23: 9130 + 415 = 9545
Step 24: 9545 + 415 = 9960
Step 25: 9960 + 415 = 10375
Step 26: 10375 + 415 = 10790
Step 27: 10790 + 415 = 11205
Step 28: 11205 + 415 = 11620
Step 29: 11620 + 415 = 12035

So, 415*29 = 12035