OK, let's work through this together. We're starting with 717 and we're going to multiply it by 207, which means we add 717 to itself 207 times.
Step 1: 0 + 717 = 717
Step 2: 717 + 717 = 1434
Step 3: 1434 + 717 = 2151
Step 4: 2151 + 717 = 2868
Step 5: 2868 + 717 = 3585
Step 6: 3585 + 717 = 4302
Step 7: 4302 + 717 = 5019
Step 8: 5019 + 717 = 5736
Step 9: 5736 + 717 = 6453
Step 10: 6453 + 717 = 7170
Step 11: 7170 + 717 = 7887
Step 12: 7887 + 717 = 8604
Step 13: 8604 + 717 = 9321
Step 14: 9321 + 717 = 10038
Step 15: 10038 + 717 = 10755
Step 16: 10755 + 717 = 11472
Step 17: 11472 + 717 = 12189
Step 18: 12189 + 717 = 12906
Step 19: 12906 + 717 = 13623
Step 20: 13623 + 717 = 14340
Step 21: 14340 + 717 = 15057
Step 22: 15057 + 717 = 15774
Step 23: 15774 + 717 = 16491
Step 24: 16491 + 717 = 17208
Step 25: 17208 + 717 = 17925
Step 26: 17925 + 717 = 18642
Step 27: 18642 + 717 = 19359
Step 28: 19359 + 717 = 20076
Step 29: 20076 + 717 = 20793
Step 30: 20793 + 717 = 21510
Step 31: 21510 + 717 = 22227
Step 32: 22227 + 717 = 22944
Step 33: 22944 + 717 = 23661
Step 34: 23661 + 717 = 24378
Step 35: 24378 + 717 = 25095
Step 36: 25095 + 717 = 25812
Step 37: 25812 + 717 = 26529
Step 38: 26529 + 717 = 27246
Step 39: 27246 + 717 = 27963
Step 40: 27963 + 717 = 28680
Step 41: 28680 + 717 = 29397
Step 42: 29397 + 717 = 30114
Step 43: 30114 + 717 = 30831
Step 44: 30831 + 717 = 31548
Step 45: 31548 + 717 = 32265
Step 46: 32265 + 717 = 32982
Step 47: 32982 + 717 = 33699
Step 48: 33699 + 717 = 34416
Step 49: 34416 + 717 = 35133
Step 50: 35133 + 717 = 35850
Step 51: 35850 + 717 = 36567
Step 52: 36567 + 717 = 37284
Step 53: 37284 + 717 = 38001
Step 54: 38001 + 717 = 38718
Step 55: 38718 + 717 = 39435
Step 56: 39435 + 717 = 40152
Step 57: 40152 + 717 = 40869
Step 58: 40869 + 717 = 41586
Step 59: 41586 + 717 = 42303
Step 60: 42303 + 717 = 43020
Step 61: 43020 + 717 = 43737
Step 62: 43737 + 717 = 44454
Step 63: 44454 + 717 = 45171
Step 64: 45171 + 717 = 45888
Step 65: 45888 + 717 = 46605
Step 66: 46605 + 717 = 47322
Step 67: 47322 + 717 = 48039
Step 68: 48039 + 717 = 48756
Step 69: 48756 + 717 = 49473
Step 70: 49473 + 717 = 50190
Step 71: 50190 + 717 = 50907
Step 72: 50907 + 717 = 51624
Step 73: 51624 + 717 = 52341
Step 74: 52341 + 717 = 53058
Step 75: 53058 + 717 = 53775
Step 76: 53775 + 717 = 54492
Step 77: 54492 + 717 = 55209
Step 78: 55209 + 717 = 55926
Step 79: 55926 + 717 = 56643
Step 80: 56643 + 717 = 57360
Step 81: 57360 + 717 = 58077
Step 82: 58077 + 717 = 58794
Step 83: 58794 + 717 = 59511
Step 84: 59511 + 717 = 60228
Step 85: 60228 + 717 = 60945
Step 86: 60945 + 717 = 61662
Step 87: 61662 + 717 = 62379
Step 88: 62379 + 717 = 63096
Step 89: 63096 + 717 = 63813
Step 90: 63813 + 717 = 64530
Step 91: 64530 + 717 = 65247
Step 92: 65247 + 717 = 65964
Step 93: 65964 + 717 = 66681
Step 94: 66681 + 717 = 67398
Step 95: 67398 + 717 = 68115
Step 96: 68115 + 717 = 68832
Step 97: 68832 + 717 = 69549
Step 98: 69549 + 717 = 70266
Step 99: 70266 + 717 = 70983
Step 100: 70983 + 717 = 71700
Step 101: 71700 + 717 = 72417
Step 102: 72417 + 717 = 73134
Step 103: 73134 + 717 = 73851
Step 104: 73851 + 717 = 74568
Step 105: 74568 + 717 = 75285
Step 106: 75285 + 717 = 76002
Step 107: 76002 + 717 = 76719
Step 108: 76719 + 717 = 77436
Step 109: 77436 + 717 = 78153
Step 110: 78153 + 717 = 78870
Step 111: 78870 + 717 = 79587
Step 112: 79587 + 717 = 80304
Step 113: 80304 + 717 = 81021
Step 114: 81021 + 717 = 81738
Step 115: 81738 + 717 = 82455
Step 116: 82455 + 717 = 83172
Step 117: 83172 + 717 = 83889
Step 118: 83889 + 717 = 84606
Step 119: 84606 + 717 = 85323
Step 120: 85323 + 717 = 86040
Step 121: 86040 + 717 = 86757
Step 122: 86757 + 717 = 87474
Step 123: 87474 + 717 = 88191
Step 124: 88191 + 717 = 88908
Step 125: 88908 + 717 = 89625
Step 126: 89625 + 717 = 90342
Step 127: 90342 + 717 = 91059
Step 128: 91059 + 717 = 91776
Step 129: 91776 + 717 = 92493
Step 130: 92493 + 717 = 93210
Step 131: 93210 + 717 = 93927
Step 132: 93927 + 717 = 94644
Step 133: 94644 + 717 = 95361
Step 134: 95361 + 717 = 96078
Step 135: 96078 + 717 = 96795
Step 136: 96795 + 717 = 97512
Step 137: 97512 + 717 = 98229
Step 138: 98229 + 717 = 98946
Step 139: 98946 + 717 = 99663
Step 140: 99663 + 717 = 100380
Step 141: 100380 + 717 = 101097
Step 142: 101097 + 717 = 101814
Step 143: 101814 + 717 = 102531
Step 144: 102531 + 717 = 103248
Step 145: 103248 + 717 = 103965
Step 146: 103965 + 717 = 104682
Step 147: 104682 + 717 = 105399
Step 148: 105399 + 717 = 106116
Step 149: 106116 + 717 = 106833
Step 150: 106833 + 717 = 107550
Step 151: 107550 + 717 = 108267
Step 152: 108267 + 717 = 108984
Step 153: 108984 + 717 = 109701
Step 154: 109701 + 717 = 110418
Step 155: 110418 + 717 = 111135
Step 156: 111135 + 717 = 111852
Step 157: 111852 + 717 = 112569
Step 158: 112569 + 717 = 113286
Step 159: 113286 + 717 = 114003
Step 160: 114003 + 717 = 114720
Step 161: 114720 + 717 = 115437
Step 162: 115437 + 717 = 116154
Step 163: 116154 + 717 = 116871
Step 164: 116871 + 717 = 117588
Step 165: 117588 + 717 = 118305
Step 166: 118305 + 717 = 119022
Step 167: 119022 + 717 = 119739
Step 168: 119739 + 717 = 120456
Step 169: 120456 + 717 = 121173
Step 170: 121173 + 717 = 121890
Step 171: 121890 + 717 = 122607
Step 172: 122607 + 717 = 123324
Step 173: 123324 + 717 = 124041
Step 174: 124041 + 717 = 124758
Step 175: 124758 + 717 = 125475
Step 176: 125475 + 717 = 126192
Step 177: 126192 + 717 = 126909
Step 178: 126909 + 717 = 127626
Step 179: 127626 + 717 = 128343
Step 180: 128343 + 717 = 129060
Step 181: 129060 + 717 = 129777
Step 182: 129777 + 717 = 130494
Step 183: 130494 + 717 = 131211
Step 184: 131211 + 717 = 131928
Step 185: 131928 + 717 = 132645
Step 186: 132645 + 717 = 133362
Step 187: 133362 + 717 = 134079
Step 188: 134079 + 717 = 134796
Step 189: 134796 + 717 = 135513
Step 190: 135513 + 717 = 136230
Step 191: 136230 + 717 = 136947
Step 192: 136947 + 717 = 137664
Step 193: 137664 + 717 = 138381
Step 194: 138381 + 717 = 139098
Step 195: 139098 + 717 = 139815
Step 196: 139815 + 717 = 140532
Step 197: 140532 + 717 = 141249
Step 198: 141249 + 717 = 141966
Step 199: 141966 + 717 = 142683
Step 200: 142683 + 717 = 143400
Step 201: 143400 + 717 = 144117
Step 202: 144117 + 717 = 144834
Step 203: 144834 + 717 = 145551
Step 204: 145551 + 717 = 146268
Step 205: 146268 + 717 = 146985
Step 206: 146985 + 717 = 147702
Step 207: 147702 + 717 = 148419

So, 717*207 = 148419