Let's roll up our sleeves and solve this. We have 799 and we're going to multiply it by 75, essentially adding 799 to itself 75 times.
Step 1: 0 + 799 = 799
Step 2: 799 + 799 = 1598
Step 3: 1598 + 799 = 2397
Step 4: 2397 + 799 = 3196
Step 5: 3196 + 799 = 3995
Step 6: 3995 + 799 = 4794
Step 7: 4794 + 799 = 5593
Step 8: 5593 + 799 = 6392
Step 9: 6392 + 799 = 7191
Step 10: 7191 + 799 = 7990
Step 11: 7990 + 799 = 8789
Step 12: 8789 + 799 = 9588
Step 13: 9588 + 799 = 10387
Step 14: 10387 + 799 = 11186
Step 15: 11186 + 799 = 11985
Step 16: 11985 + 799 = 12784
Step 17: 12784 + 799 = 13583
Step 18: 13583 + 799 = 14382
Step 19: 14382 + 799 = 15181
Step 20: 15181 + 799 = 15980
Step 21: 15980 + 799 = 16779
Step 22: 16779 + 799 = 17578
Step 23: 17578 + 799 = 18377
Step 24: 18377 + 799 = 19176
Step 25: 19176 + 799 = 19975
Step 26: 19975 + 799 = 20774
Step 27: 20774 + 799 = 21573
Step 28: 21573 + 799 = 22372
Step 29: 22372 + 799 = 23171
Step 30: 23171 + 799 = 23970
Step 31: 23970 + 799 = 24769
Step 32: 24769 + 799 = 25568
Step 33: 25568 + 799 = 26367
Step 34: 26367 + 799 = 27166
Step 35: 27166 + 799 = 27965
Step 36: 27965 + 799 = 28764
Step 37: 28764 + 799 = 29563
Step 38: 29563 + 799 = 30362
Step 39: 30362 + 799 = 31161
Step 40: 31161 + 799 = 31960
Step 41: 31960 + 799 = 32759
Step 42: 32759 + 799 = 33558
Step 43: 33558 + 799 = 34357
Step 44: 34357 + 799 = 35156
Step 45: 35156 + 799 = 35955
Step 46: 35955 + 799 = 36754
Step 47: 36754 + 799 = 37553
Step 48: 37553 + 799 = 38352
Step 49: 38352 + 799 = 39151
Step 50: 39151 + 799 = 39950
Step 51: 39950 + 799 = 40749
Step 52: 40749 + 799 = 41548
Step 53: 41548 + 799 = 42347
Step 54: 42347 + 799 = 43146
Step 55: 43146 + 799 = 43945
Step 56: 43945 + 799 = 44744
Step 57: 44744 + 799 = 45543
Step 58: 45543 + 799 = 46342
Step 59: 46342 + 799 = 47141
Step 60: 47141 + 799 = 47940
Step 61: 47940 + 799 = 48739
Step 62: 48739 + 799 = 49538
Step 63: 49538 + 799 = 50337
Step 64: 50337 + 799 = 51136
Step 65: 51136 + 799 = 51935
Step 66: 51935 + 799 = 52734
Step 67: 52734 + 799 = 53533
Step 68: 53533 + 799 = 54332
Step 69: 54332 + 799 = 55131
Step 70: 55131 + 799 = 55930
Step 71: 55930 + 799 = 56729
Step 72: 56729 + 799 = 57528
Step 73: 57528 + 799 = 58327
Step 74: 58327 + 799 = 59126
Step 75: 59126 + 799 = 59925

So, 799*75 = 59925