Alright, let's solve this math problem step by step. First, we have the number 9. 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 9 and add it to itself 123 times.
Step 1: 0 + 9 = 9
Step 2: 9 + 9 = 18
Step 3: 18 + 9 = 27
Step 4: 27 + 9 = 36
Step 5: 36 + 9 = 45
Step 6: 45 + 9 = 54
Step 7: 54 + 9 = 63
Step 8: 63 + 9 = 72
Step 9: 72 + 9 = 81
Step 10: 81 + 9 = 90
Step 11: 90 + 9 = 99
Step 12: 99 + 9 = 108
Step 13: 108 + 9 = 117
Step 14: 117 + 9 = 126
Step 15: 126 + 9 = 135
Step 16: 135 + 9 = 144
Step 17: 144 + 9 = 153
Step 18: 153 + 9 = 162
Step 19: 162 + 9 = 171
Step 20: 171 + 9 = 180
Step 21: 180 + 9 = 189
Step 22: 189 + 9 = 198
Step 23: 198 + 9 = 207
Step 24: 207 + 9 = 216
Step 25: 216 + 9 = 225
Step 26: 225 + 9 = 234
Step 27: 234 + 9 = 243
Step 28: 243 + 9 = 252
Step 29: 252 + 9 = 261
Step 30: 261 + 9 = 270
Step 31: 270 + 9 = 279
Step 32: 279 + 9 = 288
Step 33: 288 + 9 = 297
Step 34: 297 + 9 = 306
Step 35: 306 + 9 = 315
Step 36: 315 + 9 = 324
Step 37: 324 + 9 = 333
Step 38: 333 + 9 = 342
Step 39: 342 + 9 = 351
Step 40: 351 + 9 = 360
Step 41: 360 + 9 = 369
Step 42: 369 + 9 = 378
Step 43: 378 + 9 = 387
Step 44: 387 + 9 = 396
Step 45: 396 + 9 = 405
Step 46: 405 + 9 = 414
Step 47: 414 + 9 = 423
Step 48: 423 + 9 = 432
Step 49: 432 + 9 = 441
Step 50: 441 + 9 = 450
Step 51: 450 + 9 = 459
Step 52: 459 + 9 = 468
Step 53: 468 + 9 = 477
Step 54: 477 + 9 = 486
Step 55: 486 + 9 = 495
Step 56: 495 + 9 = 504
Step 57: 504 + 9 = 513
Step 58: 513 + 9 = 522
Step 59: 522 + 9 = 531
Step 60: 531 + 9 = 540
Step 61: 540 + 9 = 549
Step 62: 549 + 9 = 558
Step 63: 558 + 9 = 567
Step 64: 567 + 9 = 576
Step 65: 576 + 9 = 585
Step 66: 585 + 9 = 594
Step 67: 594 + 9 = 603
Step 68: 603 + 9 = 612
Step 69: 612 + 9 = 621
Step 70: 621 + 9 = 630
Step 71: 630 + 9 = 639
Step 72: 639 + 9 = 648
Step 73: 648 + 9 = 657
Step 74: 657 + 9 = 666
Step 75: 666 + 9 = 675
Step 76: 675 + 9 = 684
Step 77: 684 + 9 = 693
Step 78: 693 + 9 = 702
Step 79: 702 + 9 = 711
Step 80: 711 + 9 = 720
Step 81: 720 + 9 = 729
Step 82: 729 + 9 = 738
Step 83: 738 + 9 = 747
Step 84: 747 + 9 = 756
Step 85: 756 + 9 = 765
Step 86: 765 + 9 = 774
Step 87: 774 + 9 = 783
Step 88: 783 + 9 = 792
Step 89: 792 + 9 = 801
Step 90: 801 + 9 = 810
Step 91: 810 + 9 = 819
Step 92: 819 + 9 = 828
Step 93: 828 + 9 = 837
Step 94: 837 + 9 = 846
Step 95: 846 + 9 = 855
Step 96: 855 + 9 = 864
Step 97: 864 + 9 = 873
Step 98: 873 + 9 = 882
Step 99: 882 + 9 = 891
Step 100: 891 + 9 = 900
Step 101: 900 + 9 = 909
Step 102: 909 + 9 = 918
Step 103: 918 + 9 = 927
Step 104: 927 + 9 = 936
Step 105: 936 + 9 = 945
Step 106: 945 + 9 = 954
Step 107: 954 + 9 = 963
Step 108: 963 + 9 = 972
Step 109: 972 + 9 = 981
Step 110: 981 + 9 = 990
Step 111: 990 + 9 = 999
Step 112: 999 + 9 = 1008
Step 113: 1008 + 9 = 1017
Step 114: 1017 + 9 = 1026
Step 115: 1026 + 9 = 1035
Step 116: 1035 + 9 = 1044
Step 117: 1044 + 9 = 1053
Step 118: 1053 + 9 = 1062
Step 119: 1062 + 9 = 1071
Step 120: 1071 + 9 = 1080
Step 121: 1080 + 9 = 1089
Step 122: 1089 + 9 = 1098
Step 123: 1098 + 9 = 1107

So, 9*123 = 1107