Let's roll up our sleeves and solve this. We have 213 and we're going to multiply it by 125, essentially adding 213 to itself 125 times.
Step 1: 0 + 213 = 213
Step 2: 213 + 213 = 426
Step 3: 426 + 213 = 639
Step 4: 639 + 213 = 852
Step 5: 852 + 213 = 1065
Step 6: 1065 + 213 = 1278
Step 7: 1278 + 213 = 1491
Step 8: 1491 + 213 = 1704
Step 9: 1704 + 213 = 1917
Step 10: 1917 + 213 = 2130
Step 11: 2130 + 213 = 2343
Step 12: 2343 + 213 = 2556
Step 13: 2556 + 213 = 2769
Step 14: 2769 + 213 = 2982
Step 15: 2982 + 213 = 3195
Step 16: 3195 + 213 = 3408
Step 17: 3408 + 213 = 3621
Step 18: 3621 + 213 = 3834
Step 19: 3834 + 213 = 4047
Step 20: 4047 + 213 = 4260
Step 21: 4260 + 213 = 4473
Step 22: 4473 + 213 = 4686
Step 23: 4686 + 213 = 4899
Step 24: 4899 + 213 = 5112
Step 25: 5112 + 213 = 5325
Step 26: 5325 + 213 = 5538
Step 27: 5538 + 213 = 5751
Step 28: 5751 + 213 = 5964
Step 29: 5964 + 213 = 6177
Step 30: 6177 + 213 = 6390
Step 31: 6390 + 213 = 6603
Step 32: 6603 + 213 = 6816
Step 33: 6816 + 213 = 7029
Step 34: 7029 + 213 = 7242
Step 35: 7242 + 213 = 7455
Step 36: 7455 + 213 = 7668
Step 37: 7668 + 213 = 7881
Step 38: 7881 + 213 = 8094
Step 39: 8094 + 213 = 8307
Step 40: 8307 + 213 = 8520
Step 41: 8520 + 213 = 8733
Step 42: 8733 + 213 = 8946
Step 43: 8946 + 213 = 9159
Step 44: 9159 + 213 = 9372
Step 45: 9372 + 213 = 9585
Step 46: 9585 + 213 = 9798
Step 47: 9798 + 213 = 10011
Step 48: 10011 + 213 = 10224
Step 49: 10224 + 213 = 10437
Step 50: 10437 + 213 = 10650
Step 51: 10650 + 213 = 10863
Step 52: 10863 + 213 = 11076
Step 53: 11076 + 213 = 11289
Step 54: 11289 + 213 = 11502
Step 55: 11502 + 213 = 11715
Step 56: 11715 + 213 = 11928
Step 57: 11928 + 213 = 12141
Step 58: 12141 + 213 = 12354
Step 59: 12354 + 213 = 12567
Step 60: 12567 + 213 = 12780
Step 61: 12780 + 213 = 12993
Step 62: 12993 + 213 = 13206
Step 63: 13206 + 213 = 13419
Step 64: 13419 + 213 = 13632
Step 65: 13632 + 213 = 13845
Step 66: 13845 + 213 = 14058
Step 67: 14058 + 213 = 14271
Step 68: 14271 + 213 = 14484
Step 69: 14484 + 213 = 14697
Step 70: 14697 + 213 = 14910
Step 71: 14910 + 213 = 15123
Step 72: 15123 + 213 = 15336
Step 73: 15336 + 213 = 15549
Step 74: 15549 + 213 = 15762
Step 75: 15762 + 213 = 15975
Step 76: 15975 + 213 = 16188
Step 77: 16188 + 213 = 16401
Step 78: 16401 + 213 = 16614
Step 79: 16614 + 213 = 16827
Step 80: 16827 + 213 = 17040
Step 81: 17040 + 213 = 17253
Step 82: 17253 + 213 = 17466
Step 83: 17466 + 213 = 17679
Step 84: 17679 + 213 = 17892
Step 85: 17892 + 213 = 18105
Step 86: 18105 + 213 = 18318
Step 87: 18318 + 213 = 18531
Step 88: 18531 + 213 = 18744
Step 89: 18744 + 213 = 18957
Step 90: 18957 + 213 = 19170
Step 91: 19170 + 213 = 19383
Step 92: 19383 + 213 = 19596
Step 93: 19596 + 213 = 19809
Step 94: 19809 + 213 = 20022
Step 95: 20022 + 213 = 20235
Step 96: 20235 + 213 = 20448
Step 97: 20448 + 213 = 20661
Step 98: 20661 + 213 = 20874
Step 99: 20874 + 213 = 21087
Step 100: 21087 + 213 = 21300
Step 101: 21300 + 213 = 21513
Step 102: 21513 + 213 = 21726
Step 103: 21726 + 213 = 21939
Step 104: 21939 + 213 = 22152
Step 105: 22152 + 213 = 22365
Step 106: 22365 + 213 = 22578
Step 107: 22578 + 213 = 22791
Step 108: 22791 + 213 = 23004
Step 109: 23004 + 213 = 23217
Step 110: 23217 + 213 = 23430
Step 111: 23430 + 213 = 23643
Step 112: 23643 + 213 = 23856
Step 113: 23856 + 213 = 24069
Step 114: 24069 + 213 = 24282
Step 115: 24282 + 213 = 24495
Step 116: 24495 + 213 = 24708
Step 117: 24708 + 213 = 24921
Step 118: 24921 + 213 = 25134
Step 119: 25134 + 213 = 25347
Step 120: 25347 + 213 = 25560
Step 121: 25560 + 213 = 25773
Step 122: 25773 + 213 = 25986
Step 123: 25986 + 213 = 26199
Step 124: 26199 + 213 = 26412
Step 125: 26412 + 213 = 26625

So, 213*125 = 26625