Let's get this math done. We have 213 and we're going to multiply it by 345. This is the same as taking 213 and adding it to itself 345 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
Step 126: 26625 + 213 = 26838
Step 127: 26838 + 213 = 27051
Step 128: 27051 + 213 = 27264
Step 129: 27264 + 213 = 27477
Step 130: 27477 + 213 = 27690
Step 131: 27690 + 213 = 27903
Step 132: 27903 + 213 = 28116
Step 133: 28116 + 213 = 28329
Step 134: 28329 + 213 = 28542
Step 135: 28542 + 213 = 28755
Step 136: 28755 + 213 = 28968
Step 137: 28968 + 213 = 29181
Step 138: 29181 + 213 = 29394
Step 139: 29394 + 213 = 29607
Step 140: 29607 + 213 = 29820
Step 141: 29820 + 213 = 30033
Step 142: 30033 + 213 = 30246
Step 143: 30246 + 213 = 30459
Step 144: 30459 + 213 = 30672
Step 145: 30672 + 213 = 30885
Step 146: 30885 + 213 = 31098
Step 147: 31098 + 213 = 31311
Step 148: 31311 + 213 = 31524
Step 149: 31524 + 213 = 31737
Step 150: 31737 + 213 = 31950
Step 151: 31950 + 213 = 32163
Step 152: 32163 + 213 = 32376
Step 153: 32376 + 213 = 32589
Step 154: 32589 + 213 = 32802
Step 155: 32802 + 213 = 33015
Step 156: 33015 + 213 = 33228
Step 157: 33228 + 213 = 33441
Step 158: 33441 + 213 = 33654
Step 159: 33654 + 213 = 33867
Step 160: 33867 + 213 = 34080
Step 161: 34080 + 213 = 34293
Step 162: 34293 + 213 = 34506
Step 163: 34506 + 213 = 34719
Step 164: 34719 + 213 = 34932
Step 165: 34932 + 213 = 35145
Step 166: 35145 + 213 = 35358
Step 167: 35358 + 213 = 35571
Step 168: 35571 + 213 = 35784
Step 169: 35784 + 213 = 35997
Step 170: 35997 + 213 = 36210
Step 171: 36210 + 213 = 36423
Step 172: 36423 + 213 = 36636
Step 173: 36636 + 213 = 36849
Step 174: 36849 + 213 = 37062
Step 175: 37062 + 213 = 37275
Step 176: 37275 + 213 = 37488
Step 177: 37488 + 213 = 37701
Step 178: 37701 + 213 = 37914
Step 179: 37914 + 213 = 38127
Step 180: 38127 + 213 = 38340
Step 181: 38340 + 213 = 38553
Step 182: 38553 + 213 = 38766
Step 183: 38766 + 213 = 38979
Step 184: 38979 + 213 = 39192
Step 185: 39192 + 213 = 39405
Step 186: 39405 + 213 = 39618
Step 187: 39618 + 213 = 39831
Step 188: 39831 + 213 = 40044
Step 189: 40044 + 213 = 40257
Step 190: 40257 + 213 = 40470
Step 191: 40470 + 213 = 40683
Step 192: 40683 + 213 = 40896
Step 193: 40896 + 213 = 41109
Step 194: 41109 + 213 = 41322
Step 195: 41322 + 213 = 41535
Step 196: 41535 + 213 = 41748
Step 197: 41748 + 213 = 41961
Step 198: 41961 + 213 = 42174
Step 199: 42174 + 213 = 42387
Step 200: 42387 + 213 = 42600
Step 201: 42600 + 213 = 42813
Step 202: 42813 + 213 = 43026
Step 203: 43026 + 213 = 43239
Step 204: 43239 + 213 = 43452
Step 205: 43452 + 213 = 43665
Step 206: 43665 + 213 = 43878
Step 207: 43878 + 213 = 44091
Step 208: 44091 + 213 = 44304
Step 209: 44304 + 213 = 44517
Step 210: 44517 + 213 = 44730
Step 211: 44730 + 213 = 44943
Step 212: 44943 + 213 = 45156
Step 213: 45156 + 213 = 45369
Step 214: 45369 + 213 = 45582
Step 215: 45582 + 213 = 45795
Step 216: 45795 + 213 = 46008
Step 217: 46008 + 213 = 46221
Step 218: 46221 + 213 = 46434
Step 219: 46434 + 213 = 46647
Step 220: 46647 + 213 = 46860
Step 221: 46860 + 213 = 47073
Step 222: 47073 + 213 = 47286
Step 223: 47286 + 213 = 47499
Step 224: 47499 + 213 = 47712
Step 225: 47712 + 213 = 47925
Step 226: 47925 + 213 = 48138
Step 227: 48138 + 213 = 48351
Step 228: 48351 + 213 = 48564
Step 229: 48564 + 213 = 48777
Step 230: 48777 + 213 = 48990
Step 231: 48990 + 213 = 49203
Step 232: 49203 + 213 = 49416
Step 233: 49416 + 213 = 49629
Step 234: 49629 + 213 = 49842
Step 235: 49842 + 213 = 50055
Step 236: 50055 + 213 = 50268
Step 237: 50268 + 213 = 50481
Step 238: 50481 + 213 = 50694
Step 239: 50694 + 213 = 50907
Step 240: 50907 + 213 = 51120
Step 241: 51120 + 213 = 51333
Step 242: 51333 + 213 = 51546
Step 243: 51546 + 213 = 51759
Step 244: 51759 + 213 = 51972
Step 245: 51972 + 213 = 52185
Step 246: 52185 + 213 = 52398
Step 247: 52398 + 213 = 52611
Step 248: 52611 + 213 = 52824
Step 249: 52824 + 213 = 53037
Step 250: 53037 + 213 = 53250
Step 251: 53250 + 213 = 53463
Step 252: 53463 + 213 = 53676
Step 253: 53676 + 213 = 53889
Step 254: 53889 + 213 = 54102
Step 255: 54102 + 213 = 54315
Step 256: 54315 + 213 = 54528
Step 257: 54528 + 213 = 54741
Step 258: 54741 + 213 = 54954
Step 259: 54954 + 213 = 55167
Step 260: 55167 + 213 = 55380
Step 261: 55380 + 213 = 55593
Step 262: 55593 + 213 = 55806
Step 263: 55806 + 213 = 56019
Step 264: 56019 + 213 = 56232
Step 265: 56232 + 213 = 56445
Step 266: 56445 + 213 = 56658
Step 267: 56658 + 213 = 56871
Step 268: 56871 + 213 = 57084
Step 269: 57084 + 213 = 57297
Step 270: 57297 + 213 = 57510
Step 271: 57510 + 213 = 57723
Step 272: 57723 + 213 = 57936
Step 273: 57936 + 213 = 58149
Step 274: 58149 + 213 = 58362
Step 275: 58362 + 213 = 58575
Step 276: 58575 + 213 = 58788
Step 277: 58788 + 213 = 59001
Step 278: 59001 + 213 = 59214
Step 279: 59214 + 213 = 59427
Step 280: 59427 + 213 = 59640
Step 281: 59640 + 213 = 59853
Step 282: 59853 + 213 = 60066
Step 283: 60066 + 213 = 60279
Step 284: 60279 + 213 = 60492
Step 285: 60492 + 213 = 60705
Step 286: 60705 + 213 = 60918
Step 287: 60918 + 213 = 61131
Step 288: 61131 + 213 = 61344
Step 289: 61344 + 213 = 61557
Step 290: 61557 + 213 = 61770
Step 291: 61770 + 213 = 61983
Step 292: 61983 + 213 = 62196
Step 293: 62196 + 213 = 62409
Step 294: 62409 + 213 = 62622
Step 295: 62622 + 213 = 62835
Step 296: 62835 + 213 = 63048
Step 297: 63048 + 213 = 63261
Step 298: 63261 + 213 = 63474
Step 299: 63474 + 213 = 63687
Step 300: 63687 + 213 = 63900
Step 301: 63900 + 213 = 64113
Step 302: 64113 + 213 = 64326
Step 303: 64326 + 213 = 64539
Step 304: 64539 + 213 = 64752
Step 305: 64752 + 213 = 64965
Step 306: 64965 + 213 = 65178
Step 307: 65178 + 213 = 65391
Step 308: 65391 + 213 = 65604
Step 309: 65604 + 213 = 65817
Step 310: 65817 + 213 = 66030
Step 311: 66030 + 213 = 66243
Step 312: 66243 + 213 = 66456
Step 313: 66456 + 213 = 66669
Step 314: 66669 + 213 = 66882
Step 315: 66882 + 213 = 67095
Step 316: 67095 + 213 = 67308
Step 317: 67308 + 213 = 67521
Step 318: 67521 + 213 = 67734
Step 319: 67734 + 213 = 67947
Step 320: 67947 + 213 = 68160
Step 321: 68160 + 213 = 68373
Step 322: 68373 + 213 = 68586
Step 323: 68586 + 213 = 68799
Step 324: 68799 + 213 = 69012
Step 325: 69012 + 213 = 69225
Step 326: 69225 + 213 = 69438
Step 327: 69438 + 213 = 69651
Step 328: 69651 + 213 = 69864
Step 329: 69864 + 213 = 70077
Step 330: 70077 + 213 = 70290
Step 331: 70290 + 213 = 70503
Step 332: 70503 + 213 = 70716
Step 333: 70716 + 213 = 70929
Step 334: 70929 + 213 = 71142
Step 335: 71142 + 213 = 71355
Step 336: 71355 + 213 = 71568
Step 337: 71568 + 213 = 71781
Step 338: 71781 + 213 = 71994
Step 339: 71994 + 213 = 72207
Step 340: 72207 + 213 = 72420
Step 341: 72420 + 213 = 72633
Step 342: 72633 + 213 = 72846
Step 343: 72846 + 213 = 73059
Step 344: 73059 + 213 = 73272
Step 345: 73272 + 213 = 73485

So, 213*345 = 73485