Let's get this math done. We have 617 and we're going to multiply it by 306. This is the same as taking 617 and adding it to itself 306 times.
Step 1: 0 + 617 = 617
Step 2: 617 + 617 = 1234
Step 3: 1234 + 617 = 1851
Step 4: 1851 + 617 = 2468
Step 5: 2468 + 617 = 3085
Step 6: 3085 + 617 = 3702
Step 7: 3702 + 617 = 4319
Step 8: 4319 + 617 = 4936
Step 9: 4936 + 617 = 5553
Step 10: 5553 + 617 = 6170
Step 11: 6170 + 617 = 6787
Step 12: 6787 + 617 = 7404
Step 13: 7404 + 617 = 8021
Step 14: 8021 + 617 = 8638
Step 15: 8638 + 617 = 9255
Step 16: 9255 + 617 = 9872
Step 17: 9872 + 617 = 10489
Step 18: 10489 + 617 = 11106
Step 19: 11106 + 617 = 11723
Step 20: 11723 + 617 = 12340
Step 21: 12340 + 617 = 12957
Step 22: 12957 + 617 = 13574
Step 23: 13574 + 617 = 14191
Step 24: 14191 + 617 = 14808
Step 25: 14808 + 617 = 15425
Step 26: 15425 + 617 = 16042
Step 27: 16042 + 617 = 16659
Step 28: 16659 + 617 = 17276
Step 29: 17276 + 617 = 17893
Step 30: 17893 + 617 = 18510
Step 31: 18510 + 617 = 19127
Step 32: 19127 + 617 = 19744
Step 33: 19744 + 617 = 20361
Step 34: 20361 + 617 = 20978
Step 35: 20978 + 617 = 21595
Step 36: 21595 + 617 = 22212
Step 37: 22212 + 617 = 22829
Step 38: 22829 + 617 = 23446
Step 39: 23446 + 617 = 24063
Step 40: 24063 + 617 = 24680
Step 41: 24680 + 617 = 25297
Step 42: 25297 + 617 = 25914
Step 43: 25914 + 617 = 26531
Step 44: 26531 + 617 = 27148
Step 45: 27148 + 617 = 27765
Step 46: 27765 + 617 = 28382
Step 47: 28382 + 617 = 28999
Step 48: 28999 + 617 = 29616
Step 49: 29616 + 617 = 30233
Step 50: 30233 + 617 = 30850
Step 51: 30850 + 617 = 31467
Step 52: 31467 + 617 = 32084
Step 53: 32084 + 617 = 32701
Step 54: 32701 + 617 = 33318
Step 55: 33318 + 617 = 33935
Step 56: 33935 + 617 = 34552
Step 57: 34552 + 617 = 35169
Step 58: 35169 + 617 = 35786
Step 59: 35786 + 617 = 36403
Step 60: 36403 + 617 = 37020
Step 61: 37020 + 617 = 37637
Step 62: 37637 + 617 = 38254
Step 63: 38254 + 617 = 38871
Step 64: 38871 + 617 = 39488
Step 65: 39488 + 617 = 40105
Step 66: 40105 + 617 = 40722
Step 67: 40722 + 617 = 41339
Step 68: 41339 + 617 = 41956
Step 69: 41956 + 617 = 42573
Step 70: 42573 + 617 = 43190
Step 71: 43190 + 617 = 43807
Step 72: 43807 + 617 = 44424
Step 73: 44424 + 617 = 45041
Step 74: 45041 + 617 = 45658
Step 75: 45658 + 617 = 46275
Step 76: 46275 + 617 = 46892
Step 77: 46892 + 617 = 47509
Step 78: 47509 + 617 = 48126
Step 79: 48126 + 617 = 48743
Step 80: 48743 + 617 = 49360
Step 81: 49360 + 617 = 49977
Step 82: 49977 + 617 = 50594
Step 83: 50594 + 617 = 51211
Step 84: 51211 + 617 = 51828
Step 85: 51828 + 617 = 52445
Step 86: 52445 + 617 = 53062
Step 87: 53062 + 617 = 53679
Step 88: 53679 + 617 = 54296
Step 89: 54296 + 617 = 54913
Step 90: 54913 + 617 = 55530
Step 91: 55530 + 617 = 56147
Step 92: 56147 + 617 = 56764
Step 93: 56764 + 617 = 57381
Step 94: 57381 + 617 = 57998
Step 95: 57998 + 617 = 58615
Step 96: 58615 + 617 = 59232
Step 97: 59232 + 617 = 59849
Step 98: 59849 + 617 = 60466
Step 99: 60466 + 617 = 61083
Step 100: 61083 + 617 = 61700
Step 101: 61700 + 617 = 62317
Step 102: 62317 + 617 = 62934
Step 103: 62934 + 617 = 63551
Step 104: 63551 + 617 = 64168
Step 105: 64168 + 617 = 64785
Step 106: 64785 + 617 = 65402
Step 107: 65402 + 617 = 66019
Step 108: 66019 + 617 = 66636
Step 109: 66636 + 617 = 67253
Step 110: 67253 + 617 = 67870
Step 111: 67870 + 617 = 68487
Step 112: 68487 + 617 = 69104
Step 113: 69104 + 617 = 69721
Step 114: 69721 + 617 = 70338
Step 115: 70338 + 617 = 70955
Step 116: 70955 + 617 = 71572
Step 117: 71572 + 617 = 72189
Step 118: 72189 + 617 = 72806
Step 119: 72806 + 617 = 73423
Step 120: 73423 + 617 = 74040
Step 121: 74040 + 617 = 74657
Step 122: 74657 + 617 = 75274
Step 123: 75274 + 617 = 75891
Step 124: 75891 + 617 = 76508
Step 125: 76508 + 617 = 77125
Step 126: 77125 + 617 = 77742
Step 127: 77742 + 617 = 78359
Step 128: 78359 + 617 = 78976
Step 129: 78976 + 617 = 79593
Step 130: 79593 + 617 = 80210
Step 131: 80210 + 617 = 80827
Step 132: 80827 + 617 = 81444
Step 133: 81444 + 617 = 82061
Step 134: 82061 + 617 = 82678
Step 135: 82678 + 617 = 83295
Step 136: 83295 + 617 = 83912
Step 137: 83912 + 617 = 84529
Step 138: 84529 + 617 = 85146
Step 139: 85146 + 617 = 85763
Step 140: 85763 + 617 = 86380
Step 141: 86380 + 617 = 86997
Step 142: 86997 + 617 = 87614
Step 143: 87614 + 617 = 88231
Step 144: 88231 + 617 = 88848
Step 145: 88848 + 617 = 89465
Step 146: 89465 + 617 = 90082
Step 147: 90082 + 617 = 90699
Step 148: 90699 + 617 = 91316
Step 149: 91316 + 617 = 91933
Step 150: 91933 + 617 = 92550
Step 151: 92550 + 617 = 93167
Step 152: 93167 + 617 = 93784
Step 153: 93784 + 617 = 94401
Step 154: 94401 + 617 = 95018
Step 155: 95018 + 617 = 95635
Step 156: 95635 + 617 = 96252
Step 157: 96252 + 617 = 96869
Step 158: 96869 + 617 = 97486
Step 159: 97486 + 617 = 98103
Step 160: 98103 + 617 = 98720
Step 161: 98720 + 617 = 99337
Step 162: 99337 + 617 = 99954
Step 163: 99954 + 617 = 100571
Step 164: 100571 + 617 = 101188
Step 165: 101188 + 617 = 101805
Step 166: 101805 + 617 = 102422
Step 167: 102422 + 617 = 103039
Step 168: 103039 + 617 = 103656
Step 169: 103656 + 617 = 104273
Step 170: 104273 + 617 = 104890
Step 171: 104890 + 617 = 105507
Step 172: 105507 + 617 = 106124
Step 173: 106124 + 617 = 106741
Step 174: 106741 + 617 = 107358
Step 175: 107358 + 617 = 107975
Step 176: 107975 + 617 = 108592
Step 177: 108592 + 617 = 109209
Step 178: 109209 + 617 = 109826
Step 179: 109826 + 617 = 110443
Step 180: 110443 + 617 = 111060
Step 181: 111060 + 617 = 111677
Step 182: 111677 + 617 = 112294
Step 183: 112294 + 617 = 112911
Step 184: 112911 + 617 = 113528
Step 185: 113528 + 617 = 114145
Step 186: 114145 + 617 = 114762
Step 187: 114762 + 617 = 115379
Step 188: 115379 + 617 = 115996
Step 189: 115996 + 617 = 116613
Step 190: 116613 + 617 = 117230
Step 191: 117230 + 617 = 117847
Step 192: 117847 + 617 = 118464
Step 193: 118464 + 617 = 119081
Step 194: 119081 + 617 = 119698
Step 195: 119698 + 617 = 120315
Step 196: 120315 + 617 = 120932
Step 197: 120932 + 617 = 121549
Step 198: 121549 + 617 = 122166
Step 199: 122166 + 617 = 122783
Step 200: 122783 + 617 = 123400
Step 201: 123400 + 617 = 124017
Step 202: 124017 + 617 = 124634
Step 203: 124634 + 617 = 125251
Step 204: 125251 + 617 = 125868
Step 205: 125868 + 617 = 126485
Step 206: 126485 + 617 = 127102
Step 207: 127102 + 617 = 127719
Step 208: 127719 + 617 = 128336
Step 209: 128336 + 617 = 128953
Step 210: 128953 + 617 = 129570
Step 211: 129570 + 617 = 130187
Step 212: 130187 + 617 = 130804
Step 213: 130804 + 617 = 131421
Step 214: 131421 + 617 = 132038
Step 215: 132038 + 617 = 132655
Step 216: 132655 + 617 = 133272
Step 217: 133272 + 617 = 133889
Step 218: 133889 + 617 = 134506
Step 219: 134506 + 617 = 135123
Step 220: 135123 + 617 = 135740
Step 221: 135740 + 617 = 136357
Step 222: 136357 + 617 = 136974
Step 223: 136974 + 617 = 137591
Step 224: 137591 + 617 = 138208
Step 225: 138208 + 617 = 138825
Step 226: 138825 + 617 = 139442
Step 227: 139442 + 617 = 140059
Step 228: 140059 + 617 = 140676
Step 229: 140676 + 617 = 141293
Step 230: 141293 + 617 = 141910
Step 231: 141910 + 617 = 142527
Step 232: 142527 + 617 = 143144
Step 233: 143144 + 617 = 143761
Step 234: 143761 + 617 = 144378
Step 235: 144378 + 617 = 144995
Step 236: 144995 + 617 = 145612
Step 237: 145612 + 617 = 146229
Step 238: 146229 + 617 = 146846
Step 239: 146846 + 617 = 147463
Step 240: 147463 + 617 = 148080
Step 241: 148080 + 617 = 148697
Step 242: 148697 + 617 = 149314
Step 243: 149314 + 617 = 149931
Step 244: 149931 + 617 = 150548
Step 245: 150548 + 617 = 151165
Step 246: 151165 + 617 = 151782
Step 247: 151782 + 617 = 152399
Step 248: 152399 + 617 = 153016
Step 249: 153016 + 617 = 153633
Step 250: 153633 + 617 = 154250
Step 251: 154250 + 617 = 154867
Step 252: 154867 + 617 = 155484
Step 253: 155484 + 617 = 156101
Step 254: 156101 + 617 = 156718
Step 255: 156718 + 617 = 157335
Step 256: 157335 + 617 = 157952
Step 257: 157952 + 617 = 158569
Step 258: 158569 + 617 = 159186
Step 259: 159186 + 617 = 159803
Step 260: 159803 + 617 = 160420
Step 261: 160420 + 617 = 161037
Step 262: 161037 + 617 = 161654
Step 263: 161654 + 617 = 162271
Step 264: 162271 + 617 = 162888
Step 265: 162888 + 617 = 163505
Step 266: 163505 + 617 = 164122
Step 267: 164122 + 617 = 164739
Step 268: 164739 + 617 = 165356
Step 269: 165356 + 617 = 165973
Step 270: 165973 + 617 = 166590
Step 271: 166590 + 617 = 167207
Step 272: 167207 + 617 = 167824
Step 273: 167824 + 617 = 168441
Step 274: 168441 + 617 = 169058
Step 275: 169058 + 617 = 169675
Step 276: 169675 + 617 = 170292
Step 277: 170292 + 617 = 170909
Step 278: 170909 + 617 = 171526
Step 279: 171526 + 617 = 172143
Step 280: 172143 + 617 = 172760
Step 281: 172760 + 617 = 173377
Step 282: 173377 + 617 = 173994
Step 283: 173994 + 617 = 174611
Step 284: 174611 + 617 = 175228
Step 285: 175228 + 617 = 175845
Step 286: 175845 + 617 = 176462
Step 287: 176462 + 617 = 177079
Step 288: 177079 + 617 = 177696
Step 289: 177696 + 617 = 178313
Step 290: 178313 + 617 = 178930
Step 291: 178930 + 617 = 179547
Step 292: 179547 + 617 = 180164
Step 293: 180164 + 617 = 180781
Step 294: 180781 + 617 = 181398
Step 295: 181398 + 617 = 182015
Step 296: 182015 + 617 = 182632
Step 297: 182632 + 617 = 183249
Step 298: 183249 + 617 = 183866
Step 299: 183866 + 617 = 184483
Step 300: 184483 + 617 = 185100
Step 301: 185100 + 617 = 185717
Step 302: 185717 + 617 = 186334
Step 303: 186334 + 617 = 186951
Step 304: 186951 + 617 = 187568
Step 305: 187568 + 617 = 188185
Step 306: 188185 + 617 = 188802

So, 617*306 = 188802