Without delay, let's solve this. We've got 845 and we will be multiplying it by 186, that is, adding 845 to itself 186 times.
Step 1: 0 + 845 = 845
Step 2: 845 + 845 = 1690
Step 3: 1690 + 845 = 2535
Step 4: 2535 + 845 = 3380
Step 5: 3380 + 845 = 4225
Step 6: 4225 + 845 = 5070
Step 7: 5070 + 845 = 5915
Step 8: 5915 + 845 = 6760
Step 9: 6760 + 845 = 7605
Step 10: 7605 + 845 = 8450
Step 11: 8450 + 845 = 9295
Step 12: 9295 + 845 = 10140
Step 13: 10140 + 845 = 10985
Step 14: 10985 + 845 = 11830
Step 15: 11830 + 845 = 12675
Step 16: 12675 + 845 = 13520
Step 17: 13520 + 845 = 14365
Step 18: 14365 + 845 = 15210
Step 19: 15210 + 845 = 16055
Step 20: 16055 + 845 = 16900
Step 21: 16900 + 845 = 17745
Step 22: 17745 + 845 = 18590
Step 23: 18590 + 845 = 19435
Step 24: 19435 + 845 = 20280
Step 25: 20280 + 845 = 21125
Step 26: 21125 + 845 = 21970
Step 27: 21970 + 845 = 22815
Step 28: 22815 + 845 = 23660
Step 29: 23660 + 845 = 24505
Step 30: 24505 + 845 = 25350
Step 31: 25350 + 845 = 26195
Step 32: 26195 + 845 = 27040
Step 33: 27040 + 845 = 27885
Step 34: 27885 + 845 = 28730
Step 35: 28730 + 845 = 29575
Step 36: 29575 + 845 = 30420
Step 37: 30420 + 845 = 31265
Step 38: 31265 + 845 = 32110
Step 39: 32110 + 845 = 32955
Step 40: 32955 + 845 = 33800
Step 41: 33800 + 845 = 34645
Step 42: 34645 + 845 = 35490
Step 43: 35490 + 845 = 36335
Step 44: 36335 + 845 = 37180
Step 45: 37180 + 845 = 38025
Step 46: 38025 + 845 = 38870
Step 47: 38870 + 845 = 39715
Step 48: 39715 + 845 = 40560
Step 49: 40560 + 845 = 41405
Step 50: 41405 + 845 = 42250
Step 51: 42250 + 845 = 43095
Step 52: 43095 + 845 = 43940
Step 53: 43940 + 845 = 44785
Step 54: 44785 + 845 = 45630
Step 55: 45630 + 845 = 46475
Step 56: 46475 + 845 = 47320
Step 57: 47320 + 845 = 48165
Step 58: 48165 + 845 = 49010
Step 59: 49010 + 845 = 49855
Step 60: 49855 + 845 = 50700
Step 61: 50700 + 845 = 51545
Step 62: 51545 + 845 = 52390
Step 63: 52390 + 845 = 53235
Step 64: 53235 + 845 = 54080
Step 65: 54080 + 845 = 54925
Step 66: 54925 + 845 = 55770
Step 67: 55770 + 845 = 56615
Step 68: 56615 + 845 = 57460
Step 69: 57460 + 845 = 58305
Step 70: 58305 + 845 = 59150
Step 71: 59150 + 845 = 59995
Step 72: 59995 + 845 = 60840
Step 73: 60840 + 845 = 61685
Step 74: 61685 + 845 = 62530
Step 75: 62530 + 845 = 63375
Step 76: 63375 + 845 = 64220
Step 77: 64220 + 845 = 65065
Step 78: 65065 + 845 = 65910
Step 79: 65910 + 845 = 66755
Step 80: 66755 + 845 = 67600
Step 81: 67600 + 845 = 68445
Step 82: 68445 + 845 = 69290
Step 83: 69290 + 845 = 70135
Step 84: 70135 + 845 = 70980
Step 85: 70980 + 845 = 71825
Step 86: 71825 + 845 = 72670
Step 87: 72670 + 845 = 73515
Step 88: 73515 + 845 = 74360
Step 89: 74360 + 845 = 75205
Step 90: 75205 + 845 = 76050
Step 91: 76050 + 845 = 76895
Step 92: 76895 + 845 = 77740
Step 93: 77740 + 845 = 78585
Step 94: 78585 + 845 = 79430
Step 95: 79430 + 845 = 80275
Step 96: 80275 + 845 = 81120
Step 97: 81120 + 845 = 81965
Step 98: 81965 + 845 = 82810
Step 99: 82810 + 845 = 83655
Step 100: 83655 + 845 = 84500
Step 101: 84500 + 845 = 85345
Step 102: 85345 + 845 = 86190
Step 103: 86190 + 845 = 87035
Step 104: 87035 + 845 = 87880
Step 105: 87880 + 845 = 88725
Step 106: 88725 + 845 = 89570
Step 107: 89570 + 845 = 90415
Step 108: 90415 + 845 = 91260
Step 109: 91260 + 845 = 92105
Step 110: 92105 + 845 = 92950
Step 111: 92950 + 845 = 93795
Step 112: 93795 + 845 = 94640
Step 113: 94640 + 845 = 95485
Step 114: 95485 + 845 = 96330
Step 115: 96330 + 845 = 97175
Step 116: 97175 + 845 = 98020
Step 117: 98020 + 845 = 98865
Step 118: 98865 + 845 = 99710
Step 119: 99710 + 845 = 100555
Step 120: 100555 + 845 = 101400
Step 121: 101400 + 845 = 102245
Step 122: 102245 + 845 = 103090
Step 123: 103090 + 845 = 103935
Step 124: 103935 + 845 = 104780
Step 125: 104780 + 845 = 105625
Step 126: 105625 + 845 = 106470
Step 127: 106470 + 845 = 107315
Step 128: 107315 + 845 = 108160
Step 129: 108160 + 845 = 109005
Step 130: 109005 + 845 = 109850
Step 131: 109850 + 845 = 110695
Step 132: 110695 + 845 = 111540
Step 133: 111540 + 845 = 112385
Step 134: 112385 + 845 = 113230
Step 135: 113230 + 845 = 114075
Step 136: 114075 + 845 = 114920
Step 137: 114920 + 845 = 115765
Step 138: 115765 + 845 = 116610
Step 139: 116610 + 845 = 117455
Step 140: 117455 + 845 = 118300
Step 141: 118300 + 845 = 119145
Step 142: 119145 + 845 = 119990
Step 143: 119990 + 845 = 120835
Step 144: 120835 + 845 = 121680
Step 145: 121680 + 845 = 122525
Step 146: 122525 + 845 = 123370
Step 147: 123370 + 845 = 124215
Step 148: 124215 + 845 = 125060
Step 149: 125060 + 845 = 125905
Step 150: 125905 + 845 = 126750
Step 151: 126750 + 845 = 127595
Step 152: 127595 + 845 = 128440
Step 153: 128440 + 845 = 129285
Step 154: 129285 + 845 = 130130
Step 155: 130130 + 845 = 130975
Step 156: 130975 + 845 = 131820
Step 157: 131820 + 845 = 132665
Step 158: 132665 + 845 = 133510
Step 159: 133510 + 845 = 134355
Step 160: 134355 + 845 = 135200
Step 161: 135200 + 845 = 136045
Step 162: 136045 + 845 = 136890
Step 163: 136890 + 845 = 137735
Step 164: 137735 + 845 = 138580
Step 165: 138580 + 845 = 139425
Step 166: 139425 + 845 = 140270
Step 167: 140270 + 845 = 141115
Step 168: 141115 + 845 = 141960
Step 169: 141960 + 845 = 142805
Step 170: 142805 + 845 = 143650
Step 171: 143650 + 845 = 144495
Step 172: 144495 + 845 = 145340
Step 173: 145340 + 845 = 146185
Step 174: 146185 + 845 = 147030
Step 175: 147030 + 845 = 147875
Step 176: 147875 + 845 = 148720
Step 177: 148720 + 845 = 149565
Step 178: 149565 + 845 = 150410
Step 179: 150410 + 845 = 151255
Step 180: 151255 + 845 = 152100
Step 181: 152100 + 845 = 152945
Step 182: 152945 + 845 = 153790
Step 183: 153790 + 845 = 154635
Step 184: 154635 + 845 = 155480
Step 185: 155480 + 845 = 156325
Step 186: 156325 + 845 = 157170

So, 845*186 = 157170