Without delay, let's solve this. We've got 901 and we will be multiplying it by 29, that is, adding 901 to itself 29 times.
Step 1: 0 + 901 = 901
Step 2: 901 + 901 = 1802
Step 3: 1802 + 901 = 2703
Step 4: 2703 + 901 = 3604
Step 5: 3604 + 901 = 4505
Step 6: 4505 + 901 = 5406
Step 7: 5406 + 901 = 6307
Step 8: 6307 + 901 = 7208
Step 9: 7208 + 901 = 8109
Step 10: 8109 + 901 = 9010
Step 11: 9010 + 901 = 9911
Step 12: 9911 + 901 = 10812
Step 13: 10812 + 901 = 11713
Step 14: 11713 + 901 = 12614
Step 15: 12614 + 901 = 13515
Step 16: 13515 + 901 = 14416
Step 17: 14416 + 901 = 15317
Step 18: 15317 + 901 = 16218
Step 19: 16218 + 901 = 17119
Step 20: 17119 + 901 = 18020
Step 21: 18020 + 901 = 18921
Step 22: 18921 + 901 = 19822
Step 23: 19822 + 901 = 20723
Step 24: 20723 + 901 = 21624
Step 25: 21624 + 901 = 22525
Step 26: 22525 + 901 = 23426
Step 27: 23426 + 901 = 24327
Step 28: 24327 + 901 = 25228
Step 29: 25228 + 901 = 26129

So, 901*29 = 26129