Alright, let's solve this math problem step by step. First, we have the number 381. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 100. So, we're going to take the number 381 and add it to itself 100 times.
Step 1: 0 + 381 = 381
Step 2: 381 + 381 = 762
Step 3: 762 + 381 = 1143
Step 4: 1143 + 381 = 1524
Step 5: 1524 + 381 = 1905
Step 6: 1905 + 381 = 2286
Step 7: 2286 + 381 = 2667
Step 8: 2667 + 381 = 3048
Step 9: 3048 + 381 = 3429
Step 10: 3429 + 381 = 3810
Step 11: 3810 + 381 = 4191
Step 12: 4191 + 381 = 4572
Step 13: 4572 + 381 = 4953
Step 14: 4953 + 381 = 5334
Step 15: 5334 + 381 = 5715
Step 16: 5715 + 381 = 6096
Step 17: 6096 + 381 = 6477
Step 18: 6477 + 381 = 6858
Step 19: 6858 + 381 = 7239
Step 20: 7239 + 381 = 7620
Step 21: 7620 + 381 = 8001
Step 22: 8001 + 381 = 8382
Step 23: 8382 + 381 = 8763
Step 24: 8763 + 381 = 9144
Step 25: 9144 + 381 = 9525
Step 26: 9525 + 381 = 9906
Step 27: 9906 + 381 = 10287
Step 28: 10287 + 381 = 10668
Step 29: 10668 + 381 = 11049
Step 30: 11049 + 381 = 11430
Step 31: 11430 + 381 = 11811
Step 32: 11811 + 381 = 12192
Step 33: 12192 + 381 = 12573
Step 34: 12573 + 381 = 12954
Step 35: 12954 + 381 = 13335
Step 36: 13335 + 381 = 13716
Step 37: 13716 + 381 = 14097
Step 38: 14097 + 381 = 14478
Step 39: 14478 + 381 = 14859
Step 40: 14859 + 381 = 15240
Step 41: 15240 + 381 = 15621
Step 42: 15621 + 381 = 16002
Step 43: 16002 + 381 = 16383
Step 44: 16383 + 381 = 16764
Step 45: 16764 + 381 = 17145
Step 46: 17145 + 381 = 17526
Step 47: 17526 + 381 = 17907
Step 48: 17907 + 381 = 18288
Step 49: 18288 + 381 = 18669
Step 50: 18669 + 381 = 19050
Step 51: 19050 + 381 = 19431
Step 52: 19431 + 381 = 19812
Step 53: 19812 + 381 = 20193
Step 54: 20193 + 381 = 20574
Step 55: 20574 + 381 = 20955
Step 56: 20955 + 381 = 21336
Step 57: 21336 + 381 = 21717
Step 58: 21717 + 381 = 22098
Step 59: 22098 + 381 = 22479
Step 60: 22479 + 381 = 22860
Step 61: 22860 + 381 = 23241
Step 62: 23241 + 381 = 23622
Step 63: 23622 + 381 = 24003
Step 64: 24003 + 381 = 24384
Step 65: 24384 + 381 = 24765
Step 66: 24765 + 381 = 25146
Step 67: 25146 + 381 = 25527
Step 68: 25527 + 381 = 25908
Step 69: 25908 + 381 = 26289
Step 70: 26289 + 381 = 26670
Step 71: 26670 + 381 = 27051
Step 72: 27051 + 381 = 27432
Step 73: 27432 + 381 = 27813
Step 74: 27813 + 381 = 28194
Step 75: 28194 + 381 = 28575
Step 76: 28575 + 381 = 28956
Step 77: 28956 + 381 = 29337
Step 78: 29337 + 381 = 29718
Step 79: 29718 + 381 = 30099
Step 80: 30099 + 381 = 30480
Step 81: 30480 + 381 = 30861
Step 82: 30861 + 381 = 31242
Step 83: 31242 + 381 = 31623
Step 84: 31623 + 381 = 32004
Step 85: 32004 + 381 = 32385
Step 86: 32385 + 381 = 32766
Step 87: 32766 + 381 = 33147
Step 88: 33147 + 381 = 33528
Step 89: 33528 + 381 = 33909
Step 90: 33909 + 381 = 34290
Step 91: 34290 + 381 = 34671
Step 92: 34671 + 381 = 35052
Step 93: 35052 + 381 = 35433
Step 94: 35433 + 381 = 35814
Step 95: 35814 + 381 = 36195
Step 96: 36195 + 381 = 36576
Step 97: 36576 + 381 = 36957
Step 98: 36957 + 381 = 37338
Step 99: 37338 + 381 = 37719
Step 100: 37719 + 381 = 38100

So, 381*100 = 38100