Alright, let's solve this math problem step by step. First, we have the number 605. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 145. So, we're going to take the number 605 and add it to itself 145 times.
Step 1: 0 + 605 = 605
Step 2: 605 + 605 = 1210
Step 3: 1210 + 605 = 1815
Step 4: 1815 + 605 = 2420
Step 5: 2420 + 605 = 3025
Step 6: 3025 + 605 = 3630
Step 7: 3630 + 605 = 4235
Step 8: 4235 + 605 = 4840
Step 9: 4840 + 605 = 5445
Step 10: 5445 + 605 = 6050
Step 11: 6050 + 605 = 6655
Step 12: 6655 + 605 = 7260
Step 13: 7260 + 605 = 7865
Step 14: 7865 + 605 = 8470
Step 15: 8470 + 605 = 9075
Step 16: 9075 + 605 = 9680
Step 17: 9680 + 605 = 10285
Step 18: 10285 + 605 = 10890
Step 19: 10890 + 605 = 11495
Step 20: 11495 + 605 = 12100
Step 21: 12100 + 605 = 12705
Step 22: 12705 + 605 = 13310
Step 23: 13310 + 605 = 13915
Step 24: 13915 + 605 = 14520
Step 25: 14520 + 605 = 15125
Step 26: 15125 + 605 = 15730
Step 27: 15730 + 605 = 16335
Step 28: 16335 + 605 = 16940
Step 29: 16940 + 605 = 17545
Step 30: 17545 + 605 = 18150
Step 31: 18150 + 605 = 18755
Step 32: 18755 + 605 = 19360
Step 33: 19360 + 605 = 19965
Step 34: 19965 + 605 = 20570
Step 35: 20570 + 605 = 21175
Step 36: 21175 + 605 = 21780
Step 37: 21780 + 605 = 22385
Step 38: 22385 + 605 = 22990
Step 39: 22990 + 605 = 23595
Step 40: 23595 + 605 = 24200
Step 41: 24200 + 605 = 24805
Step 42: 24805 + 605 = 25410
Step 43: 25410 + 605 = 26015
Step 44: 26015 + 605 = 26620
Step 45: 26620 + 605 = 27225
Step 46: 27225 + 605 = 27830
Step 47: 27830 + 605 = 28435
Step 48: 28435 + 605 = 29040
Step 49: 29040 + 605 = 29645
Step 50: 29645 + 605 = 30250
Step 51: 30250 + 605 = 30855
Step 52: 30855 + 605 = 31460
Step 53: 31460 + 605 = 32065
Step 54: 32065 + 605 = 32670
Step 55: 32670 + 605 = 33275
Step 56: 33275 + 605 = 33880
Step 57: 33880 + 605 = 34485
Step 58: 34485 + 605 = 35090
Step 59: 35090 + 605 = 35695
Step 60: 35695 + 605 = 36300
Step 61: 36300 + 605 = 36905
Step 62: 36905 + 605 = 37510
Step 63: 37510 + 605 = 38115
Step 64: 38115 + 605 = 38720
Step 65: 38720 + 605 = 39325
Step 66: 39325 + 605 = 39930
Step 67: 39930 + 605 = 40535
Step 68: 40535 + 605 = 41140
Step 69: 41140 + 605 = 41745
Step 70: 41745 + 605 = 42350
Step 71: 42350 + 605 = 42955
Step 72: 42955 + 605 = 43560
Step 73: 43560 + 605 = 44165
Step 74: 44165 + 605 = 44770
Step 75: 44770 + 605 = 45375
Step 76: 45375 + 605 = 45980
Step 77: 45980 + 605 = 46585
Step 78: 46585 + 605 = 47190
Step 79: 47190 + 605 = 47795
Step 80: 47795 + 605 = 48400
Step 81: 48400 + 605 = 49005
Step 82: 49005 + 605 = 49610
Step 83: 49610 + 605 = 50215
Step 84: 50215 + 605 = 50820
Step 85: 50820 + 605 = 51425
Step 86: 51425 + 605 = 52030
Step 87: 52030 + 605 = 52635
Step 88: 52635 + 605 = 53240
Step 89: 53240 + 605 = 53845
Step 90: 53845 + 605 = 54450
Step 91: 54450 + 605 = 55055
Step 92: 55055 + 605 = 55660
Step 93: 55660 + 605 = 56265
Step 94: 56265 + 605 = 56870
Step 95: 56870 + 605 = 57475
Step 96: 57475 + 605 = 58080
Step 97: 58080 + 605 = 58685
Step 98: 58685 + 605 = 59290
Step 99: 59290 + 605 = 59895
Step 100: 59895 + 605 = 60500
Step 101: 60500 + 605 = 61105
Step 102: 61105 + 605 = 61710
Step 103: 61710 + 605 = 62315
Step 104: 62315 + 605 = 62920
Step 105: 62920 + 605 = 63525
Step 106: 63525 + 605 = 64130
Step 107: 64130 + 605 = 64735
Step 108: 64735 + 605 = 65340
Step 109: 65340 + 605 = 65945
Step 110: 65945 + 605 = 66550
Step 111: 66550 + 605 = 67155
Step 112: 67155 + 605 = 67760
Step 113: 67760 + 605 = 68365
Step 114: 68365 + 605 = 68970
Step 115: 68970 + 605 = 69575
Step 116: 69575 + 605 = 70180
Step 117: 70180 + 605 = 70785
Step 118: 70785 + 605 = 71390
Step 119: 71390 + 605 = 71995
Step 120: 71995 + 605 = 72600
Step 121: 72600 + 605 = 73205
Step 122: 73205 + 605 = 73810
Step 123: 73810 + 605 = 74415
Step 124: 74415 + 605 = 75020
Step 125: 75020 + 605 = 75625
Step 126: 75625 + 605 = 76230
Step 127: 76230 + 605 = 76835
Step 128: 76835 + 605 = 77440
Step 129: 77440 + 605 = 78045
Step 130: 78045 + 605 = 78650
Step 131: 78650 + 605 = 79255
Step 132: 79255 + 605 = 79860
Step 133: 79860 + 605 = 80465
Step 134: 80465 + 605 = 81070
Step 135: 81070 + 605 = 81675
Step 136: 81675 + 605 = 82280
Step 137: 82280 + 605 = 82885
Step 138: 82885 + 605 = 83490
Step 139: 83490 + 605 = 84095
Step 140: 84095 + 605 = 84700
Step 141: 84700 + 605 = 85305
Step 142: 85305 + 605 = 85910
Step 143: 85910 + 605 = 86515
Step 144: 86515 + 605 = 87120
Step 145: 87120 + 605 = 87725

So, 605*145 = 87725