Alright, let's solve this math problem step by step. First, we have the number 990. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 166. So, we're going to take the number 990 and add it to itself 166 times.
Step 1: 0 + 990 = 990
Step 2: 990 + 990 = 1980
Step 3: 1980 + 990 = 2970
Step 4: 2970 + 990 = 3960
Step 5: 3960 + 990 = 4950
Step 6: 4950 + 990 = 5940
Step 7: 5940 + 990 = 6930
Step 8: 6930 + 990 = 7920
Step 9: 7920 + 990 = 8910
Step 10: 8910 + 990 = 9900
Step 11: 9900 + 990 = 10890
Step 12: 10890 + 990 = 11880
Step 13: 11880 + 990 = 12870
Step 14: 12870 + 990 = 13860
Step 15: 13860 + 990 = 14850
Step 16: 14850 + 990 = 15840
Step 17: 15840 + 990 = 16830
Step 18: 16830 + 990 = 17820
Step 19: 17820 + 990 = 18810
Step 20: 18810 + 990 = 19800
Step 21: 19800 + 990 = 20790
Step 22: 20790 + 990 = 21780
Step 23: 21780 + 990 = 22770
Step 24: 22770 + 990 = 23760
Step 25: 23760 + 990 = 24750
Step 26: 24750 + 990 = 25740
Step 27: 25740 + 990 = 26730
Step 28: 26730 + 990 = 27720
Step 29: 27720 + 990 = 28710
Step 30: 28710 + 990 = 29700
Step 31: 29700 + 990 = 30690
Step 32: 30690 + 990 = 31680
Step 33: 31680 + 990 = 32670
Step 34: 32670 + 990 = 33660
Step 35: 33660 + 990 = 34650
Step 36: 34650 + 990 = 35640
Step 37: 35640 + 990 = 36630
Step 38: 36630 + 990 = 37620
Step 39: 37620 + 990 = 38610
Step 40: 38610 + 990 = 39600
Step 41: 39600 + 990 = 40590
Step 42: 40590 + 990 = 41580
Step 43: 41580 + 990 = 42570
Step 44: 42570 + 990 = 43560
Step 45: 43560 + 990 = 44550
Step 46: 44550 + 990 = 45540
Step 47: 45540 + 990 = 46530
Step 48: 46530 + 990 = 47520
Step 49: 47520 + 990 = 48510
Step 50: 48510 + 990 = 49500
Step 51: 49500 + 990 = 50490
Step 52: 50490 + 990 = 51480
Step 53: 51480 + 990 = 52470
Step 54: 52470 + 990 = 53460
Step 55: 53460 + 990 = 54450
Step 56: 54450 + 990 = 55440
Step 57: 55440 + 990 = 56430
Step 58: 56430 + 990 = 57420
Step 59: 57420 + 990 = 58410
Step 60: 58410 + 990 = 59400
Step 61: 59400 + 990 = 60390
Step 62: 60390 + 990 = 61380
Step 63: 61380 + 990 = 62370
Step 64: 62370 + 990 = 63360
Step 65: 63360 + 990 = 64350
Step 66: 64350 + 990 = 65340
Step 67: 65340 + 990 = 66330
Step 68: 66330 + 990 = 67320
Step 69: 67320 + 990 = 68310
Step 70: 68310 + 990 = 69300
Step 71: 69300 + 990 = 70290
Step 72: 70290 + 990 = 71280
Step 73: 71280 + 990 = 72270
Step 74: 72270 + 990 = 73260
Step 75: 73260 + 990 = 74250
Step 76: 74250 + 990 = 75240
Step 77: 75240 + 990 = 76230
Step 78: 76230 + 990 = 77220
Step 79: 77220 + 990 = 78210
Step 80: 78210 + 990 = 79200
Step 81: 79200 + 990 = 80190
Step 82: 80190 + 990 = 81180
Step 83: 81180 + 990 = 82170
Step 84: 82170 + 990 = 83160
Step 85: 83160 + 990 = 84150
Step 86: 84150 + 990 = 85140
Step 87: 85140 + 990 = 86130
Step 88: 86130 + 990 = 87120
Step 89: 87120 + 990 = 88110
Step 90: 88110 + 990 = 89100
Step 91: 89100 + 990 = 90090
Step 92: 90090 + 990 = 91080
Step 93: 91080 + 990 = 92070
Step 94: 92070 + 990 = 93060
Step 95: 93060 + 990 = 94050
Step 96: 94050 + 990 = 95040
Step 97: 95040 + 990 = 96030
Step 98: 96030 + 990 = 97020
Step 99: 97020 + 990 = 98010
Step 100: 98010 + 990 = 99000
Step 101: 99000 + 990 = 99990
Step 102: 99990 + 990 = 100980
Step 103: 100980 + 990 = 101970
Step 104: 101970 + 990 = 102960
Step 105: 102960 + 990 = 103950
Step 106: 103950 + 990 = 104940
Step 107: 104940 + 990 = 105930
Step 108: 105930 + 990 = 106920
Step 109: 106920 + 990 = 107910
Step 110: 107910 + 990 = 108900
Step 111: 108900 + 990 = 109890
Step 112: 109890 + 990 = 110880
Step 113: 110880 + 990 = 111870
Step 114: 111870 + 990 = 112860
Step 115: 112860 + 990 = 113850
Step 116: 113850 + 990 = 114840
Step 117: 114840 + 990 = 115830
Step 118: 115830 + 990 = 116820
Step 119: 116820 + 990 = 117810
Step 120: 117810 + 990 = 118800
Step 121: 118800 + 990 = 119790
Step 122: 119790 + 990 = 120780
Step 123: 120780 + 990 = 121770
Step 124: 121770 + 990 = 122760
Step 125: 122760 + 990 = 123750
Step 126: 123750 + 990 = 124740
Step 127: 124740 + 990 = 125730
Step 128: 125730 + 990 = 126720
Step 129: 126720 + 990 = 127710
Step 130: 127710 + 990 = 128700
Step 131: 128700 + 990 = 129690
Step 132: 129690 + 990 = 130680
Step 133: 130680 + 990 = 131670
Step 134: 131670 + 990 = 132660
Step 135: 132660 + 990 = 133650
Step 136: 133650 + 990 = 134640
Step 137: 134640 + 990 = 135630
Step 138: 135630 + 990 = 136620
Step 139: 136620 + 990 = 137610
Step 140: 137610 + 990 = 138600
Step 141: 138600 + 990 = 139590
Step 142: 139590 + 990 = 140580
Step 143: 140580 + 990 = 141570
Step 144: 141570 + 990 = 142560
Step 145: 142560 + 990 = 143550
Step 146: 143550 + 990 = 144540
Step 147: 144540 + 990 = 145530
Step 148: 145530 + 990 = 146520
Step 149: 146520 + 990 = 147510
Step 150: 147510 + 990 = 148500
Step 151: 148500 + 990 = 149490
Step 152: 149490 + 990 = 150480
Step 153: 150480 + 990 = 151470
Step 154: 151470 + 990 = 152460
Step 155: 152460 + 990 = 153450
Step 156: 153450 + 990 = 154440
Step 157: 154440 + 990 = 155430
Step 158: 155430 + 990 = 156420
Step 159: 156420 + 990 = 157410
Step 160: 157410 + 990 = 158400
Step 161: 158400 + 990 = 159390
Step 162: 159390 + 990 = 160380
Step 163: 160380 + 990 = 161370
Step 164: 161370 + 990 = 162360
Step 165: 162360 + 990 = 163350
Step 166: 163350 + 990 = 164340

So, 990*166 = 164340