Alright, let's solve this math problem step by step. First, we have the number 753. 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 753 and add it to itself 42 times.
Step 1: 0 + 753 = 753
Step 2: 753 + 753 = 1506
Step 3: 1506 + 753 = 2259
Step 4: 2259 + 753 = 3012
Step 5: 3012 + 753 = 3765
Step 6: 3765 + 753 = 4518
Step 7: 4518 + 753 = 5271
Step 8: 5271 + 753 = 6024
Step 9: 6024 + 753 = 6777
Step 10: 6777 + 753 = 7530
Step 11: 7530 + 753 = 8283
Step 12: 8283 + 753 = 9036
Step 13: 9036 + 753 = 9789
Step 14: 9789 + 753 = 10542
Step 15: 10542 + 753 = 11295
Step 16: 11295 + 753 = 12048
Step 17: 12048 + 753 = 12801
Step 18: 12801 + 753 = 13554
Step 19: 13554 + 753 = 14307
Step 20: 14307 + 753 = 15060
Step 21: 15060 + 753 = 15813
Step 22: 15813 + 753 = 16566
Step 23: 16566 + 753 = 17319
Step 24: 17319 + 753 = 18072
Step 25: 18072 + 753 = 18825
Step 26: 18825 + 753 = 19578
Step 27: 19578 + 753 = 20331
Step 28: 20331 + 753 = 21084
Step 29: 21084 + 753 = 21837
Step 30: 21837 + 753 = 22590
Step 31: 22590 + 753 = 23343
Step 32: 23343 + 753 = 24096
Step 33: 24096 + 753 = 24849
Step 34: 24849 + 753 = 25602
Step 35: 25602 + 753 = 26355
Step 36: 26355 + 753 = 27108
Step 37: 27108 + 753 = 27861
Step 38: 27861 + 753 = 28614
Step 39: 28614 + 753 = 29367
Step 40: 29367 + 753 = 30120
Step 41: 30120 + 753 = 30873
Step 42: 30873 + 753 = 31626

So, 753*42 = 31626