Let's get this math done. We have 665 and we're going to multiply it by 115. This is the same as taking 665 and adding it to itself 115 times.
Step 1: 0 + 665 = 665
Step 2: 665 + 665 = 1330
Step 3: 1330 + 665 = 1995
Step 4: 1995 + 665 = 2660
Step 5: 2660 + 665 = 3325
Step 6: 3325 + 665 = 3990
Step 7: 3990 + 665 = 4655
Step 8: 4655 + 665 = 5320
Step 9: 5320 + 665 = 5985
Step 10: 5985 + 665 = 6650
Step 11: 6650 + 665 = 7315
Step 12: 7315 + 665 = 7980
Step 13: 7980 + 665 = 8645
Step 14: 8645 + 665 = 9310
Step 15: 9310 + 665 = 9975
Step 16: 9975 + 665 = 10640
Step 17: 10640 + 665 = 11305
Step 18: 11305 + 665 = 11970
Step 19: 11970 + 665 = 12635
Step 20: 12635 + 665 = 13300
Step 21: 13300 + 665 = 13965
Step 22: 13965 + 665 = 14630
Step 23: 14630 + 665 = 15295
Step 24: 15295 + 665 = 15960
Step 25: 15960 + 665 = 16625
Step 26: 16625 + 665 = 17290
Step 27: 17290 + 665 = 17955
Step 28: 17955 + 665 = 18620
Step 29: 18620 + 665 = 19285
Step 30: 19285 + 665 = 19950
Step 31: 19950 + 665 = 20615
Step 32: 20615 + 665 = 21280
Step 33: 21280 + 665 = 21945
Step 34: 21945 + 665 = 22610
Step 35: 22610 + 665 = 23275
Step 36: 23275 + 665 = 23940
Step 37: 23940 + 665 = 24605
Step 38: 24605 + 665 = 25270
Step 39: 25270 + 665 = 25935
Step 40: 25935 + 665 = 26600
Step 41: 26600 + 665 = 27265
Step 42: 27265 + 665 = 27930
Step 43: 27930 + 665 = 28595
Step 44: 28595 + 665 = 29260
Step 45: 29260 + 665 = 29925
Step 46: 29925 + 665 = 30590
Step 47: 30590 + 665 = 31255
Step 48: 31255 + 665 = 31920
Step 49: 31920 + 665 = 32585
Step 50: 32585 + 665 = 33250
Step 51: 33250 + 665 = 33915
Step 52: 33915 + 665 = 34580
Step 53: 34580 + 665 = 35245
Step 54: 35245 + 665 = 35910
Step 55: 35910 + 665 = 36575
Step 56: 36575 + 665 = 37240
Step 57: 37240 + 665 = 37905
Step 58: 37905 + 665 = 38570
Step 59: 38570 + 665 = 39235
Step 60: 39235 + 665 = 39900
Step 61: 39900 + 665 = 40565
Step 62: 40565 + 665 = 41230
Step 63: 41230 + 665 = 41895
Step 64: 41895 + 665 = 42560
Step 65: 42560 + 665 = 43225
Step 66: 43225 + 665 = 43890
Step 67: 43890 + 665 = 44555
Step 68: 44555 + 665 = 45220
Step 69: 45220 + 665 = 45885
Step 70: 45885 + 665 = 46550
Step 71: 46550 + 665 = 47215
Step 72: 47215 + 665 = 47880
Step 73: 47880 + 665 = 48545
Step 74: 48545 + 665 = 49210
Step 75: 49210 + 665 = 49875
Step 76: 49875 + 665 = 50540
Step 77: 50540 + 665 = 51205
Step 78: 51205 + 665 = 51870
Step 79: 51870 + 665 = 52535
Step 80: 52535 + 665 = 53200
Step 81: 53200 + 665 = 53865
Step 82: 53865 + 665 = 54530
Step 83: 54530 + 665 = 55195
Step 84: 55195 + 665 = 55860
Step 85: 55860 + 665 = 56525
Step 86: 56525 + 665 = 57190
Step 87: 57190 + 665 = 57855
Step 88: 57855 + 665 = 58520
Step 89: 58520 + 665 = 59185
Step 90: 59185 + 665 = 59850
Step 91: 59850 + 665 = 60515
Step 92: 60515 + 665 = 61180
Step 93: 61180 + 665 = 61845
Step 94: 61845 + 665 = 62510
Step 95: 62510 + 665 = 63175
Step 96: 63175 + 665 = 63840
Step 97: 63840 + 665 = 64505
Step 98: 64505 + 665 = 65170
Step 99: 65170 + 665 = 65835
Step 100: 65835 + 665 = 66500
Step 101: 66500 + 665 = 67165
Step 102: 67165 + 665 = 67830
Step 103: 67830 + 665 = 68495
Step 104: 68495 + 665 = 69160
Step 105: 69160 + 665 = 69825
Step 106: 69825 + 665 = 70490
Step 107: 70490 + 665 = 71155
Step 108: 71155 + 665 = 71820
Step 109: 71820 + 665 = 72485
Step 110: 72485 + 665 = 73150
Step 111: 73150 + 665 = 73815
Step 112: 73815 + 665 = 74480
Step 113: 74480 + 665 = 75145
Step 114: 75145 + 665 = 75810
Step 115: 75810 + 665 = 76475

So, 665*115 = 76475