Alright, let's solve this math problem step by step. First, we have the number 84. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 123. So, we're going to take the number 84 and add it to itself 123 times.
Step 1: 0 + 84 = 84
Step 2: 84 + 84 = 168
Step 3: 168 + 84 = 252
Step 4: 252 + 84 = 336
Step 5: 336 + 84 = 420
Step 6: 420 + 84 = 504
Step 7: 504 + 84 = 588
Step 8: 588 + 84 = 672
Step 9: 672 + 84 = 756
Step 10: 756 + 84 = 840
Step 11: 840 + 84 = 924
Step 12: 924 + 84 = 1008
Step 13: 1008 + 84 = 1092
Step 14: 1092 + 84 = 1176
Step 15: 1176 + 84 = 1260
Step 16: 1260 + 84 = 1344
Step 17: 1344 + 84 = 1428
Step 18: 1428 + 84 = 1512
Step 19: 1512 + 84 = 1596
Step 20: 1596 + 84 = 1680
Step 21: 1680 + 84 = 1764
Step 22: 1764 + 84 = 1848
Step 23: 1848 + 84 = 1932
Step 24: 1932 + 84 = 2016
Step 25: 2016 + 84 = 2100
Step 26: 2100 + 84 = 2184
Step 27: 2184 + 84 = 2268
Step 28: 2268 + 84 = 2352
Step 29: 2352 + 84 = 2436
Step 30: 2436 + 84 = 2520
Step 31: 2520 + 84 = 2604
Step 32: 2604 + 84 = 2688
Step 33: 2688 + 84 = 2772
Step 34: 2772 + 84 = 2856
Step 35: 2856 + 84 = 2940
Step 36: 2940 + 84 = 3024
Step 37: 3024 + 84 = 3108
Step 38: 3108 + 84 = 3192
Step 39: 3192 + 84 = 3276
Step 40: 3276 + 84 = 3360
Step 41: 3360 + 84 = 3444
Step 42: 3444 + 84 = 3528
Step 43: 3528 + 84 = 3612
Step 44: 3612 + 84 = 3696
Step 45: 3696 + 84 = 3780
Step 46: 3780 + 84 = 3864
Step 47: 3864 + 84 = 3948
Step 48: 3948 + 84 = 4032
Step 49: 4032 + 84 = 4116
Step 50: 4116 + 84 = 4200
Step 51: 4200 + 84 = 4284
Step 52: 4284 + 84 = 4368
Step 53: 4368 + 84 = 4452
Step 54: 4452 + 84 = 4536
Step 55: 4536 + 84 = 4620
Step 56: 4620 + 84 = 4704
Step 57: 4704 + 84 = 4788
Step 58: 4788 + 84 = 4872
Step 59: 4872 + 84 = 4956
Step 60: 4956 + 84 = 5040
Step 61: 5040 + 84 = 5124
Step 62: 5124 + 84 = 5208
Step 63: 5208 + 84 = 5292
Step 64: 5292 + 84 = 5376
Step 65: 5376 + 84 = 5460
Step 66: 5460 + 84 = 5544
Step 67: 5544 + 84 = 5628
Step 68: 5628 + 84 = 5712
Step 69: 5712 + 84 = 5796
Step 70: 5796 + 84 = 5880
Step 71: 5880 + 84 = 5964
Step 72: 5964 + 84 = 6048
Step 73: 6048 + 84 = 6132
Step 74: 6132 + 84 = 6216
Step 75: 6216 + 84 = 6300
Step 76: 6300 + 84 = 6384
Step 77: 6384 + 84 = 6468
Step 78: 6468 + 84 = 6552
Step 79: 6552 + 84 = 6636
Step 80: 6636 + 84 = 6720
Step 81: 6720 + 84 = 6804
Step 82: 6804 + 84 = 6888
Step 83: 6888 + 84 = 6972
Step 84: 6972 + 84 = 7056
Step 85: 7056 + 84 = 7140
Step 86: 7140 + 84 = 7224
Step 87: 7224 + 84 = 7308
Step 88: 7308 + 84 = 7392
Step 89: 7392 + 84 = 7476
Step 90: 7476 + 84 = 7560
Step 91: 7560 + 84 = 7644
Step 92: 7644 + 84 = 7728
Step 93: 7728 + 84 = 7812
Step 94: 7812 + 84 = 7896
Step 95: 7896 + 84 = 7980
Step 96: 7980 + 84 = 8064
Step 97: 8064 + 84 = 8148
Step 98: 8148 + 84 = 8232
Step 99: 8232 + 84 = 8316
Step 100: 8316 + 84 = 8400
Step 101: 8400 + 84 = 8484
Step 102: 8484 + 84 = 8568
Step 103: 8568 + 84 = 8652
Step 104: 8652 + 84 = 8736
Step 105: 8736 + 84 = 8820
Step 106: 8820 + 84 = 8904
Step 107: 8904 + 84 = 8988
Step 108: 8988 + 84 = 9072
Step 109: 9072 + 84 = 9156
Step 110: 9156 + 84 = 9240
Step 111: 9240 + 84 = 9324
Step 112: 9324 + 84 = 9408
Step 113: 9408 + 84 = 9492
Step 114: 9492 + 84 = 9576
Step 115: 9576 + 84 = 9660
Step 116: 9660 + 84 = 9744
Step 117: 9744 + 84 = 9828
Step 118: 9828 + 84 = 9912
Step 119: 9912 + 84 = 9996
Step 120: 9996 + 84 = 10080
Step 121: 10080 + 84 = 10164
Step 122: 10164 + 84 = 10248
Step 123: 10248 + 84 = 10332

So, 84*123 = 10332