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 303. So, we're going to take the number 990 and add it to itself 303 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
Step 167: 164340 + 990 = 165330
Step 168: 165330 + 990 = 166320
Step 169: 166320 + 990 = 167310
Step 170: 167310 + 990 = 168300
Step 171: 168300 + 990 = 169290
Step 172: 169290 + 990 = 170280
Step 173: 170280 + 990 = 171270
Step 174: 171270 + 990 = 172260
Step 175: 172260 + 990 = 173250
Step 176: 173250 + 990 = 174240
Step 177: 174240 + 990 = 175230
Step 178: 175230 + 990 = 176220
Step 179: 176220 + 990 = 177210
Step 180: 177210 + 990 = 178200
Step 181: 178200 + 990 = 179190
Step 182: 179190 + 990 = 180180
Step 183: 180180 + 990 = 181170
Step 184: 181170 + 990 = 182160
Step 185: 182160 + 990 = 183150
Step 186: 183150 + 990 = 184140
Step 187: 184140 + 990 = 185130
Step 188: 185130 + 990 = 186120
Step 189: 186120 + 990 = 187110
Step 190: 187110 + 990 = 188100
Step 191: 188100 + 990 = 189090
Step 192: 189090 + 990 = 190080
Step 193: 190080 + 990 = 191070
Step 194: 191070 + 990 = 192060
Step 195: 192060 + 990 = 193050
Step 196: 193050 + 990 = 194040
Step 197: 194040 + 990 = 195030
Step 198: 195030 + 990 = 196020
Step 199: 196020 + 990 = 197010
Step 200: 197010 + 990 = 198000
Step 201: 198000 + 990 = 198990
Step 202: 198990 + 990 = 199980
Step 203: 199980 + 990 = 200970
Step 204: 200970 + 990 = 201960
Step 205: 201960 + 990 = 202950
Step 206: 202950 + 990 = 203940
Step 207: 203940 + 990 = 204930
Step 208: 204930 + 990 = 205920
Step 209: 205920 + 990 = 206910
Step 210: 206910 + 990 = 207900
Step 211: 207900 + 990 = 208890
Step 212: 208890 + 990 = 209880
Step 213: 209880 + 990 = 210870
Step 214: 210870 + 990 = 211860
Step 215: 211860 + 990 = 212850
Step 216: 212850 + 990 = 213840
Step 217: 213840 + 990 = 214830
Step 218: 214830 + 990 = 215820
Step 219: 215820 + 990 = 216810
Step 220: 216810 + 990 = 217800
Step 221: 217800 + 990 = 218790
Step 222: 218790 + 990 = 219780
Step 223: 219780 + 990 = 220770
Step 224: 220770 + 990 = 221760
Step 225: 221760 + 990 = 222750
Step 226: 222750 + 990 = 223740
Step 227: 223740 + 990 = 224730
Step 228: 224730 + 990 = 225720
Step 229: 225720 + 990 = 226710
Step 230: 226710 + 990 = 227700
Step 231: 227700 + 990 = 228690
Step 232: 228690 + 990 = 229680
Step 233: 229680 + 990 = 230670
Step 234: 230670 + 990 = 231660
Step 235: 231660 + 990 = 232650
Step 236: 232650 + 990 = 233640
Step 237: 233640 + 990 = 234630
Step 238: 234630 + 990 = 235620
Step 239: 235620 + 990 = 236610
Step 240: 236610 + 990 = 237600
Step 241: 237600 + 990 = 238590
Step 242: 238590 + 990 = 239580
Step 243: 239580 + 990 = 240570
Step 244: 240570 + 990 = 241560
Step 245: 241560 + 990 = 242550
Step 246: 242550 + 990 = 243540
Step 247: 243540 + 990 = 244530
Step 248: 244530 + 990 = 245520
Step 249: 245520 + 990 = 246510
Step 250: 246510 + 990 = 247500
Step 251: 247500 + 990 = 248490
Step 252: 248490 + 990 = 249480
Step 253: 249480 + 990 = 250470
Step 254: 250470 + 990 = 251460
Step 255: 251460 + 990 = 252450
Step 256: 252450 + 990 = 253440
Step 257: 253440 + 990 = 254430
Step 258: 254430 + 990 = 255420
Step 259: 255420 + 990 = 256410
Step 260: 256410 + 990 = 257400
Step 261: 257400 + 990 = 258390
Step 262: 258390 + 990 = 259380
Step 263: 259380 + 990 = 260370
Step 264: 260370 + 990 = 261360
Step 265: 261360 + 990 = 262350
Step 266: 262350 + 990 = 263340
Step 267: 263340 + 990 = 264330
Step 268: 264330 + 990 = 265320
Step 269: 265320 + 990 = 266310
Step 270: 266310 + 990 = 267300
Step 271: 267300 + 990 = 268290
Step 272: 268290 + 990 = 269280
Step 273: 269280 + 990 = 270270
Step 274: 270270 + 990 = 271260
Step 275: 271260 + 990 = 272250
Step 276: 272250 + 990 = 273240
Step 277: 273240 + 990 = 274230
Step 278: 274230 + 990 = 275220
Step 279: 275220 + 990 = 276210
Step 280: 276210 + 990 = 277200
Step 281: 277200 + 990 = 278190
Step 282: 278190 + 990 = 279180
Step 283: 279180 + 990 = 280170
Step 284: 280170 + 990 = 281160
Step 285: 281160 + 990 = 282150
Step 286: 282150 + 990 = 283140
Step 287: 283140 + 990 = 284130
Step 288: 284130 + 990 = 285120
Step 289: 285120 + 990 = 286110
Step 290: 286110 + 990 = 287100
Step 291: 287100 + 990 = 288090
Step 292: 288090 + 990 = 289080
Step 293: 289080 + 990 = 290070
Step 294: 290070 + 990 = 291060
Step 295: 291060 + 990 = 292050
Step 296: 292050 + 990 = 293040
Step 297: 293040 + 990 = 294030
Step 298: 294030 + 990 = 295020
Step 299: 295020 + 990 = 296010
Step 300: 296010 + 990 = 297000
Step 301: 297000 + 990 = 297990
Step 302: 297990 + 990 = 298980
Step 303: 298980 + 990 = 299970

So, 990*303 = 299970