Alright, let's solve this math problem step by step. First, we have the number 378. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 199. So, we're going to take the number 378 and add it to itself 199 times.
Step 1: 0 + 378 = 378
Step 2: 378 + 378 = 756
Step 3: 756 + 378 = 1134
Step 4: 1134 + 378 = 1512
Step 5: 1512 + 378 = 1890
Step 6: 1890 + 378 = 2268
Step 7: 2268 + 378 = 2646
Step 8: 2646 + 378 = 3024
Step 9: 3024 + 378 = 3402
Step 10: 3402 + 378 = 3780
Step 11: 3780 + 378 = 4158
Step 12: 4158 + 378 = 4536
Step 13: 4536 + 378 = 4914
Step 14: 4914 + 378 = 5292
Step 15: 5292 + 378 = 5670
Step 16: 5670 + 378 = 6048
Step 17: 6048 + 378 = 6426
Step 18: 6426 + 378 = 6804
Step 19: 6804 + 378 = 7182
Step 20: 7182 + 378 = 7560
Step 21: 7560 + 378 = 7938
Step 22: 7938 + 378 = 8316
Step 23: 8316 + 378 = 8694
Step 24: 8694 + 378 = 9072
Step 25: 9072 + 378 = 9450
Step 26: 9450 + 378 = 9828
Step 27: 9828 + 378 = 10206
Step 28: 10206 + 378 = 10584
Step 29: 10584 + 378 = 10962
Step 30: 10962 + 378 = 11340
Step 31: 11340 + 378 = 11718
Step 32: 11718 + 378 = 12096
Step 33: 12096 + 378 = 12474
Step 34: 12474 + 378 = 12852
Step 35: 12852 + 378 = 13230
Step 36: 13230 + 378 = 13608
Step 37: 13608 + 378 = 13986
Step 38: 13986 + 378 = 14364
Step 39: 14364 + 378 = 14742
Step 40: 14742 + 378 = 15120
Step 41: 15120 + 378 = 15498
Step 42: 15498 + 378 = 15876
Step 43: 15876 + 378 = 16254
Step 44: 16254 + 378 = 16632
Step 45: 16632 + 378 = 17010
Step 46: 17010 + 378 = 17388
Step 47: 17388 + 378 = 17766
Step 48: 17766 + 378 = 18144
Step 49: 18144 + 378 = 18522
Step 50: 18522 + 378 = 18900
Step 51: 18900 + 378 = 19278
Step 52: 19278 + 378 = 19656
Step 53: 19656 + 378 = 20034
Step 54: 20034 + 378 = 20412
Step 55: 20412 + 378 = 20790
Step 56: 20790 + 378 = 21168
Step 57: 21168 + 378 = 21546
Step 58: 21546 + 378 = 21924
Step 59: 21924 + 378 = 22302
Step 60: 22302 + 378 = 22680
Step 61: 22680 + 378 = 23058
Step 62: 23058 + 378 = 23436
Step 63: 23436 + 378 = 23814
Step 64: 23814 + 378 = 24192
Step 65: 24192 + 378 = 24570
Step 66: 24570 + 378 = 24948
Step 67: 24948 + 378 = 25326
Step 68: 25326 + 378 = 25704
Step 69: 25704 + 378 = 26082
Step 70: 26082 + 378 = 26460
Step 71: 26460 + 378 = 26838
Step 72: 26838 + 378 = 27216
Step 73: 27216 + 378 = 27594
Step 74: 27594 + 378 = 27972
Step 75: 27972 + 378 = 28350
Step 76: 28350 + 378 = 28728
Step 77: 28728 + 378 = 29106
Step 78: 29106 + 378 = 29484
Step 79: 29484 + 378 = 29862
Step 80: 29862 + 378 = 30240
Step 81: 30240 + 378 = 30618
Step 82: 30618 + 378 = 30996
Step 83: 30996 + 378 = 31374
Step 84: 31374 + 378 = 31752
Step 85: 31752 + 378 = 32130
Step 86: 32130 + 378 = 32508
Step 87: 32508 + 378 = 32886
Step 88: 32886 + 378 = 33264
Step 89: 33264 + 378 = 33642
Step 90: 33642 + 378 = 34020
Step 91: 34020 + 378 = 34398
Step 92: 34398 + 378 = 34776
Step 93: 34776 + 378 = 35154
Step 94: 35154 + 378 = 35532
Step 95: 35532 + 378 = 35910
Step 96: 35910 + 378 = 36288
Step 97: 36288 + 378 = 36666
Step 98: 36666 + 378 = 37044
Step 99: 37044 + 378 = 37422
Step 100: 37422 + 378 = 37800
Step 101: 37800 + 378 = 38178
Step 102: 38178 + 378 = 38556
Step 103: 38556 + 378 = 38934
Step 104: 38934 + 378 = 39312
Step 105: 39312 + 378 = 39690
Step 106: 39690 + 378 = 40068
Step 107: 40068 + 378 = 40446
Step 108: 40446 + 378 = 40824
Step 109: 40824 + 378 = 41202
Step 110: 41202 + 378 = 41580
Step 111: 41580 + 378 = 41958
Step 112: 41958 + 378 = 42336
Step 113: 42336 + 378 = 42714
Step 114: 42714 + 378 = 43092
Step 115: 43092 + 378 = 43470
Step 116: 43470 + 378 = 43848
Step 117: 43848 + 378 = 44226
Step 118: 44226 + 378 = 44604
Step 119: 44604 + 378 = 44982
Step 120: 44982 + 378 = 45360
Step 121: 45360 + 378 = 45738
Step 122: 45738 + 378 = 46116
Step 123: 46116 + 378 = 46494
Step 124: 46494 + 378 = 46872
Step 125: 46872 + 378 = 47250
Step 126: 47250 + 378 = 47628
Step 127: 47628 + 378 = 48006
Step 128: 48006 + 378 = 48384
Step 129: 48384 + 378 = 48762
Step 130: 48762 + 378 = 49140
Step 131: 49140 + 378 = 49518
Step 132: 49518 + 378 = 49896
Step 133: 49896 + 378 = 50274
Step 134: 50274 + 378 = 50652
Step 135: 50652 + 378 = 51030
Step 136: 51030 + 378 = 51408
Step 137: 51408 + 378 = 51786
Step 138: 51786 + 378 = 52164
Step 139: 52164 + 378 = 52542
Step 140: 52542 + 378 = 52920
Step 141: 52920 + 378 = 53298
Step 142: 53298 + 378 = 53676
Step 143: 53676 + 378 = 54054
Step 144: 54054 + 378 = 54432
Step 145: 54432 + 378 = 54810
Step 146: 54810 + 378 = 55188
Step 147: 55188 + 378 = 55566
Step 148: 55566 + 378 = 55944
Step 149: 55944 + 378 = 56322
Step 150: 56322 + 378 = 56700
Step 151: 56700 + 378 = 57078
Step 152: 57078 + 378 = 57456
Step 153: 57456 + 378 = 57834
Step 154: 57834 + 378 = 58212
Step 155: 58212 + 378 = 58590
Step 156: 58590 + 378 = 58968
Step 157: 58968 + 378 = 59346
Step 158: 59346 + 378 = 59724
Step 159: 59724 + 378 = 60102
Step 160: 60102 + 378 = 60480
Step 161: 60480 + 378 = 60858
Step 162: 60858 + 378 = 61236
Step 163: 61236 + 378 = 61614
Step 164: 61614 + 378 = 61992
Step 165: 61992 + 378 = 62370
Step 166: 62370 + 378 = 62748
Step 167: 62748 + 378 = 63126
Step 168: 63126 + 378 = 63504
Step 169: 63504 + 378 = 63882
Step 170: 63882 + 378 = 64260
Step 171: 64260 + 378 = 64638
Step 172: 64638 + 378 = 65016
Step 173: 65016 + 378 = 65394
Step 174: 65394 + 378 = 65772
Step 175: 65772 + 378 = 66150
Step 176: 66150 + 378 = 66528
Step 177: 66528 + 378 = 66906
Step 178: 66906 + 378 = 67284
Step 179: 67284 + 378 = 67662
Step 180: 67662 + 378 = 68040
Step 181: 68040 + 378 = 68418
Step 182: 68418 + 378 = 68796
Step 183: 68796 + 378 = 69174
Step 184: 69174 + 378 = 69552
Step 185: 69552 + 378 = 69930
Step 186: 69930 + 378 = 70308
Step 187: 70308 + 378 = 70686
Step 188: 70686 + 378 = 71064
Step 189: 71064 + 378 = 71442
Step 190: 71442 + 378 = 71820
Step 191: 71820 + 378 = 72198
Step 192: 72198 + 378 = 72576
Step 193: 72576 + 378 = 72954
Step 194: 72954 + 378 = 73332
Step 195: 73332 + 378 = 73710
Step 196: 73710 + 378 = 74088
Step 197: 74088 + 378 = 74466
Step 198: 74466 + 378 = 74844
Step 199: 74844 + 378 = 75222

So, 378*199 = 75222