Sure thing! We've got 354 and we're gonna multiply it by 99. That's the same as adding 354 to itself 99 times.
Step 1: 0 + 354 = 354
Step 2: 354 + 354 = 708
Step 3: 708 + 354 = 1062
Step 4: 1062 + 354 = 1416
Step 5: 1416 + 354 = 1770
Step 6: 1770 + 354 = 2124
Step 7: 2124 + 354 = 2478
Step 8: 2478 + 354 = 2832
Step 9: 2832 + 354 = 3186
Step 10: 3186 + 354 = 3540
Step 11: 3540 + 354 = 3894
Step 12: 3894 + 354 = 4248
Step 13: 4248 + 354 = 4602
Step 14: 4602 + 354 = 4956
Step 15: 4956 + 354 = 5310
Step 16: 5310 + 354 = 5664
Step 17: 5664 + 354 = 6018
Step 18: 6018 + 354 = 6372
Step 19: 6372 + 354 = 6726
Step 20: 6726 + 354 = 7080
Step 21: 7080 + 354 = 7434
Step 22: 7434 + 354 = 7788
Step 23: 7788 + 354 = 8142
Step 24: 8142 + 354 = 8496
Step 25: 8496 + 354 = 8850
Step 26: 8850 + 354 = 9204
Step 27: 9204 + 354 = 9558
Step 28: 9558 + 354 = 9912
Step 29: 9912 + 354 = 10266
Step 30: 10266 + 354 = 10620
Step 31: 10620 + 354 = 10974
Step 32: 10974 + 354 = 11328
Step 33: 11328 + 354 = 11682
Step 34: 11682 + 354 = 12036
Step 35: 12036 + 354 = 12390
Step 36: 12390 + 354 = 12744
Step 37: 12744 + 354 = 13098
Step 38: 13098 + 354 = 13452
Step 39: 13452 + 354 = 13806
Step 40: 13806 + 354 = 14160
Step 41: 14160 + 354 = 14514
Step 42: 14514 + 354 = 14868
Step 43: 14868 + 354 = 15222
Step 44: 15222 + 354 = 15576
Step 45: 15576 + 354 = 15930
Step 46: 15930 + 354 = 16284
Step 47: 16284 + 354 = 16638
Step 48: 16638 + 354 = 16992
Step 49: 16992 + 354 = 17346
Step 50: 17346 + 354 = 17700
Step 51: 17700 + 354 = 18054
Step 52: 18054 + 354 = 18408
Step 53: 18408 + 354 = 18762
Step 54: 18762 + 354 = 19116
Step 55: 19116 + 354 = 19470
Step 56: 19470 + 354 = 19824
Step 57: 19824 + 354 = 20178
Step 58: 20178 + 354 = 20532
Step 59: 20532 + 354 = 20886
Step 60: 20886 + 354 = 21240
Step 61: 21240 + 354 = 21594
Step 62: 21594 + 354 = 21948
Step 63: 21948 + 354 = 22302
Step 64: 22302 + 354 = 22656
Step 65: 22656 + 354 = 23010
Step 66: 23010 + 354 = 23364
Step 67: 23364 + 354 = 23718
Step 68: 23718 + 354 = 24072
Step 69: 24072 + 354 = 24426
Step 70: 24426 + 354 = 24780
Step 71: 24780 + 354 = 25134
Step 72: 25134 + 354 = 25488
Step 73: 25488 + 354 = 25842
Step 74: 25842 + 354 = 26196
Step 75: 26196 + 354 = 26550
Step 76: 26550 + 354 = 26904
Step 77: 26904 + 354 = 27258
Step 78: 27258 + 354 = 27612
Step 79: 27612 + 354 = 27966
Step 80: 27966 + 354 = 28320
Step 81: 28320 + 354 = 28674
Step 82: 28674 + 354 = 29028
Step 83: 29028 + 354 = 29382
Step 84: 29382 + 354 = 29736
Step 85: 29736 + 354 = 30090
Step 86: 30090 + 354 = 30444
Step 87: 30444 + 354 = 30798
Step 88: 30798 + 354 = 31152
Step 89: 31152 + 354 = 31506
Step 90: 31506 + 354 = 31860
Step 91: 31860 + 354 = 32214
Step 92: 32214 + 354 = 32568
Step 93: 32568 + 354 = 32922
Step 94: 32922 + 354 = 33276
Step 95: 33276 + 354 = 33630
Step 96: 33630 + 354 = 33984
Step 97: 33984 + 354 = 34338
Step 98: 34338 + 354 = 34692
Step 99: 34692 + 354 = 35046

So, 354*99 = 35046