Alright, let's solve this math problem step by step. First, we have the number 396. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 138. So, we're going to take the number 396 and add it to itself 138 times.
Step 1: 0 + 396 = 396
Step 2: 396 + 396 = 792
Step 3: 792 + 396 = 1188
Step 4: 1188 + 396 = 1584
Step 5: 1584 + 396 = 1980
Step 6: 1980 + 396 = 2376
Step 7: 2376 + 396 = 2772
Step 8: 2772 + 396 = 3168
Step 9: 3168 + 396 = 3564
Step 10: 3564 + 396 = 3960
Step 11: 3960 + 396 = 4356
Step 12: 4356 + 396 = 4752
Step 13: 4752 + 396 = 5148
Step 14: 5148 + 396 = 5544
Step 15: 5544 + 396 = 5940
Step 16: 5940 + 396 = 6336
Step 17: 6336 + 396 = 6732
Step 18: 6732 + 396 = 7128
Step 19: 7128 + 396 = 7524
Step 20: 7524 + 396 = 7920
Step 21: 7920 + 396 = 8316
Step 22: 8316 + 396 = 8712
Step 23: 8712 + 396 = 9108
Step 24: 9108 + 396 = 9504
Step 25: 9504 + 396 = 9900
Step 26: 9900 + 396 = 10296
Step 27: 10296 + 396 = 10692
Step 28: 10692 + 396 = 11088
Step 29: 11088 + 396 = 11484
Step 30: 11484 + 396 = 11880
Step 31: 11880 + 396 = 12276
Step 32: 12276 + 396 = 12672
Step 33: 12672 + 396 = 13068
Step 34: 13068 + 396 = 13464
Step 35: 13464 + 396 = 13860
Step 36: 13860 + 396 = 14256
Step 37: 14256 + 396 = 14652
Step 38: 14652 + 396 = 15048
Step 39: 15048 + 396 = 15444
Step 40: 15444 + 396 = 15840
Step 41: 15840 + 396 = 16236
Step 42: 16236 + 396 = 16632
Step 43: 16632 + 396 = 17028
Step 44: 17028 + 396 = 17424
Step 45: 17424 + 396 = 17820
Step 46: 17820 + 396 = 18216
Step 47: 18216 + 396 = 18612
Step 48: 18612 + 396 = 19008
Step 49: 19008 + 396 = 19404
Step 50: 19404 + 396 = 19800
Step 51: 19800 + 396 = 20196
Step 52: 20196 + 396 = 20592
Step 53: 20592 + 396 = 20988
Step 54: 20988 + 396 = 21384
Step 55: 21384 + 396 = 21780
Step 56: 21780 + 396 = 22176
Step 57: 22176 + 396 = 22572
Step 58: 22572 + 396 = 22968
Step 59: 22968 + 396 = 23364
Step 60: 23364 + 396 = 23760
Step 61: 23760 + 396 = 24156
Step 62: 24156 + 396 = 24552
Step 63: 24552 + 396 = 24948
Step 64: 24948 + 396 = 25344
Step 65: 25344 + 396 = 25740
Step 66: 25740 + 396 = 26136
Step 67: 26136 + 396 = 26532
Step 68: 26532 + 396 = 26928
Step 69: 26928 + 396 = 27324
Step 70: 27324 + 396 = 27720
Step 71: 27720 + 396 = 28116
Step 72: 28116 + 396 = 28512
Step 73: 28512 + 396 = 28908
Step 74: 28908 + 396 = 29304
Step 75: 29304 + 396 = 29700
Step 76: 29700 + 396 = 30096
Step 77: 30096 + 396 = 30492
Step 78: 30492 + 396 = 30888
Step 79: 30888 + 396 = 31284
Step 80: 31284 + 396 = 31680
Step 81: 31680 + 396 = 32076
Step 82: 32076 + 396 = 32472
Step 83: 32472 + 396 = 32868
Step 84: 32868 + 396 = 33264
Step 85: 33264 + 396 = 33660
Step 86: 33660 + 396 = 34056
Step 87: 34056 + 396 = 34452
Step 88: 34452 + 396 = 34848
Step 89: 34848 + 396 = 35244
Step 90: 35244 + 396 = 35640
Step 91: 35640 + 396 = 36036
Step 92: 36036 + 396 = 36432
Step 93: 36432 + 396 = 36828
Step 94: 36828 + 396 = 37224
Step 95: 37224 + 396 = 37620
Step 96: 37620 + 396 = 38016
Step 97: 38016 + 396 = 38412
Step 98: 38412 + 396 = 38808
Step 99: 38808 + 396 = 39204
Step 100: 39204 + 396 = 39600
Step 101: 39600 + 396 = 39996
Step 102: 39996 + 396 = 40392
Step 103: 40392 + 396 = 40788
Step 104: 40788 + 396 = 41184
Step 105: 41184 + 396 = 41580
Step 106: 41580 + 396 = 41976
Step 107: 41976 + 396 = 42372
Step 108: 42372 + 396 = 42768
Step 109: 42768 + 396 = 43164
Step 110: 43164 + 396 = 43560
Step 111: 43560 + 396 = 43956
Step 112: 43956 + 396 = 44352
Step 113: 44352 + 396 = 44748
Step 114: 44748 + 396 = 45144
Step 115: 45144 + 396 = 45540
Step 116: 45540 + 396 = 45936
Step 117: 45936 + 396 = 46332
Step 118: 46332 + 396 = 46728
Step 119: 46728 + 396 = 47124
Step 120: 47124 + 396 = 47520
Step 121: 47520 + 396 = 47916
Step 122: 47916 + 396 = 48312
Step 123: 48312 + 396 = 48708
Step 124: 48708 + 396 = 49104
Step 125: 49104 + 396 = 49500
Step 126: 49500 + 396 = 49896
Step 127: 49896 + 396 = 50292
Step 128: 50292 + 396 = 50688
Step 129: 50688 + 396 = 51084
Step 130: 51084 + 396 = 51480
Step 131: 51480 + 396 = 51876
Step 132: 51876 + 396 = 52272
Step 133: 52272 + 396 = 52668
Step 134: 52668 + 396 = 53064
Step 135: 53064 + 396 = 53460
Step 136: 53460 + 396 = 53856
Step 137: 53856 + 396 = 54252
Step 138: 54252 + 396 = 54648

So, 396*138 = 54648