Alright, let's solve this math problem step by step. First, we have the number 901. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 42. So, we're going to take the number 901 and add it to itself 42 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
Step 30: 26129 + 901 = 27030
Step 31: 27030 + 901 = 27931
Step 32: 27931 + 901 = 28832
Step 33: 28832 + 901 = 29733
Step 34: 29733 + 901 = 30634
Step 35: 30634 + 901 = 31535
Step 36: 31535 + 901 = 32436
Step 37: 32436 + 901 = 33337
Step 38: 33337 + 901 = 34238
Step 39: 34238 + 901 = 35139
Step 40: 35139 + 901 = 36040
Step 41: 36040 + 901 = 36941
Step 42: 36941 + 901 = 37842

So, 901*42 = 37842