OK, let's work through this together. We're starting with 388 and we're going to multiply it by 54, which means we add 388 to itself 54 times.
Step 1: 0 + 388 = 388
Step 2: 388 + 388 = 776
Step 3: 776 + 388 = 1164
Step 4: 1164 + 388 = 1552
Step 5: 1552 + 388 = 1940
Step 6: 1940 + 388 = 2328
Step 7: 2328 + 388 = 2716
Step 8: 2716 + 388 = 3104
Step 9: 3104 + 388 = 3492
Step 10: 3492 + 388 = 3880
Step 11: 3880 + 388 = 4268
Step 12: 4268 + 388 = 4656
Step 13: 4656 + 388 = 5044
Step 14: 5044 + 388 = 5432
Step 15: 5432 + 388 = 5820
Step 16: 5820 + 388 = 6208
Step 17: 6208 + 388 = 6596
Step 18: 6596 + 388 = 6984
Step 19: 6984 + 388 = 7372
Step 20: 7372 + 388 = 7760
Step 21: 7760 + 388 = 8148
Step 22: 8148 + 388 = 8536
Step 23: 8536 + 388 = 8924
Step 24: 8924 + 388 = 9312
Step 25: 9312 + 388 = 9700
Step 26: 9700 + 388 = 10088
Step 27: 10088 + 388 = 10476
Step 28: 10476 + 388 = 10864
Step 29: 10864 + 388 = 11252
Step 30: 11252 + 388 = 11640
Step 31: 11640 + 388 = 12028
Step 32: 12028 + 388 = 12416
Step 33: 12416 + 388 = 12804
Step 34: 12804 + 388 = 13192
Step 35: 13192 + 388 = 13580
Step 36: 13580 + 388 = 13968
Step 37: 13968 + 388 = 14356
Step 38: 14356 + 388 = 14744
Step 39: 14744 + 388 = 15132
Step 40: 15132 + 388 = 15520
Step 41: 15520 + 388 = 15908
Step 42: 15908 + 388 = 16296
Step 43: 16296 + 388 = 16684
Step 44: 16684 + 388 = 17072
Step 45: 17072 + 388 = 17460
Step 46: 17460 + 388 = 17848
Step 47: 17848 + 388 = 18236
Step 48: 18236 + 388 = 18624
Step 49: 18624 + 388 = 19012
Step 50: 19012 + 388 = 19400
Step 51: 19400 + 388 = 19788
Step 52: 19788 + 388 = 20176
Step 53: 20176 + 388 = 20564
Step 54: 20564 + 388 = 20952

So, 388*54 = 20952