Alright, let's solve this math problem step by step. First, we have the number 685. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 221. So, we're going to take the number 685 and add it to itself 221 times.
Step 1: 0 + 685 = 685
Step 2: 685 + 685 = 1370
Step 3: 1370 + 685 = 2055
Step 4: 2055 + 685 = 2740
Step 5: 2740 + 685 = 3425
Step 6: 3425 + 685 = 4110
Step 7: 4110 + 685 = 4795
Step 8: 4795 + 685 = 5480
Step 9: 5480 + 685 = 6165
Step 10: 6165 + 685 = 6850
Step 11: 6850 + 685 = 7535
Step 12: 7535 + 685 = 8220
Step 13: 8220 + 685 = 8905
Step 14: 8905 + 685 = 9590
Step 15: 9590 + 685 = 10275
Step 16: 10275 + 685 = 10960
Step 17: 10960 + 685 = 11645
Step 18: 11645 + 685 = 12330
Step 19: 12330 + 685 = 13015
Step 20: 13015 + 685 = 13700
Step 21: 13700 + 685 = 14385
Step 22: 14385 + 685 = 15070
Step 23: 15070 + 685 = 15755
Step 24: 15755 + 685 = 16440
Step 25: 16440 + 685 = 17125
Step 26: 17125 + 685 = 17810
Step 27: 17810 + 685 = 18495
Step 28: 18495 + 685 = 19180
Step 29: 19180 + 685 = 19865
Step 30: 19865 + 685 = 20550
Step 31: 20550 + 685 = 21235
Step 32: 21235 + 685 = 21920
Step 33: 21920 + 685 = 22605
Step 34: 22605 + 685 = 23290
Step 35: 23290 + 685 = 23975
Step 36: 23975 + 685 = 24660
Step 37: 24660 + 685 = 25345
Step 38: 25345 + 685 = 26030
Step 39: 26030 + 685 = 26715
Step 40: 26715 + 685 = 27400
Step 41: 27400 + 685 = 28085
Step 42: 28085 + 685 = 28770
Step 43: 28770 + 685 = 29455
Step 44: 29455 + 685 = 30140
Step 45: 30140 + 685 = 30825
Step 46: 30825 + 685 = 31510
Step 47: 31510 + 685 = 32195
Step 48: 32195 + 685 = 32880
Step 49: 32880 + 685 = 33565
Step 50: 33565 + 685 = 34250
Step 51: 34250 + 685 = 34935
Step 52: 34935 + 685 = 35620
Step 53: 35620 + 685 = 36305
Step 54: 36305 + 685 = 36990
Step 55: 36990 + 685 = 37675
Step 56: 37675 + 685 = 38360
Step 57: 38360 + 685 = 39045
Step 58: 39045 + 685 = 39730
Step 59: 39730 + 685 = 40415
Step 60: 40415 + 685 = 41100
Step 61: 41100 + 685 = 41785
Step 62: 41785 + 685 = 42470
Step 63: 42470 + 685 = 43155
Step 64: 43155 + 685 = 43840
Step 65: 43840 + 685 = 44525
Step 66: 44525 + 685 = 45210
Step 67: 45210 + 685 = 45895
Step 68: 45895 + 685 = 46580
Step 69: 46580 + 685 = 47265
Step 70: 47265 + 685 = 47950
Step 71: 47950 + 685 = 48635
Step 72: 48635 + 685 = 49320
Step 73: 49320 + 685 = 50005
Step 74: 50005 + 685 = 50690
Step 75: 50690 + 685 = 51375
Step 76: 51375 + 685 = 52060
Step 77: 52060 + 685 = 52745
Step 78: 52745 + 685 = 53430
Step 79: 53430 + 685 = 54115
Step 80: 54115 + 685 = 54800
Step 81: 54800 + 685 = 55485
Step 82: 55485 + 685 = 56170
Step 83: 56170 + 685 = 56855
Step 84: 56855 + 685 = 57540
Step 85: 57540 + 685 = 58225
Step 86: 58225 + 685 = 58910
Step 87: 58910 + 685 = 59595
Step 88: 59595 + 685 = 60280
Step 89: 60280 + 685 = 60965
Step 90: 60965 + 685 = 61650
Step 91: 61650 + 685 = 62335
Step 92: 62335 + 685 = 63020
Step 93: 63020 + 685 = 63705
Step 94: 63705 + 685 = 64390
Step 95: 64390 + 685 = 65075
Step 96: 65075 + 685 = 65760
Step 97: 65760 + 685 = 66445
Step 98: 66445 + 685 = 67130
Step 99: 67130 + 685 = 67815
Step 100: 67815 + 685 = 68500
Step 101: 68500 + 685 = 69185
Step 102: 69185 + 685 = 69870
Step 103: 69870 + 685 = 70555
Step 104: 70555 + 685 = 71240
Step 105: 71240 + 685 = 71925
Step 106: 71925 + 685 = 72610
Step 107: 72610 + 685 = 73295
Step 108: 73295 + 685 = 73980
Step 109: 73980 + 685 = 74665
Step 110: 74665 + 685 = 75350
Step 111: 75350 + 685 = 76035
Step 112: 76035 + 685 = 76720
Step 113: 76720 + 685 = 77405
Step 114: 77405 + 685 = 78090
Step 115: 78090 + 685 = 78775
Step 116: 78775 + 685 = 79460
Step 117: 79460 + 685 = 80145
Step 118: 80145 + 685 = 80830
Step 119: 80830 + 685 = 81515
Step 120: 81515 + 685 = 82200
Step 121: 82200 + 685 = 82885
Step 122: 82885 + 685 = 83570
Step 123: 83570 + 685 = 84255
Step 124: 84255 + 685 = 84940
Step 125: 84940 + 685 = 85625
Step 126: 85625 + 685 = 86310
Step 127: 86310 + 685 = 86995
Step 128: 86995 + 685 = 87680
Step 129: 87680 + 685 = 88365
Step 130: 88365 + 685 = 89050
Step 131: 89050 + 685 = 89735
Step 132: 89735 + 685 = 90420
Step 133: 90420 + 685 = 91105
Step 134: 91105 + 685 = 91790
Step 135: 91790 + 685 = 92475
Step 136: 92475 + 685 = 93160
Step 137: 93160 + 685 = 93845
Step 138: 93845 + 685 = 94530
Step 139: 94530 + 685 = 95215
Step 140: 95215 + 685 = 95900
Step 141: 95900 + 685 = 96585
Step 142: 96585 + 685 = 97270
Step 143: 97270 + 685 = 97955
Step 144: 97955 + 685 = 98640
Step 145: 98640 + 685 = 99325
Step 146: 99325 + 685 = 100010
Step 147: 100010 + 685 = 100695
Step 148: 100695 + 685 = 101380
Step 149: 101380 + 685 = 102065
Step 150: 102065 + 685 = 102750
Step 151: 102750 + 685 = 103435
Step 152: 103435 + 685 = 104120
Step 153: 104120 + 685 = 104805
Step 154: 104805 + 685 = 105490
Step 155: 105490 + 685 = 106175
Step 156: 106175 + 685 = 106860
Step 157: 106860 + 685 = 107545
Step 158: 107545 + 685 = 108230
Step 159: 108230 + 685 = 108915
Step 160: 108915 + 685 = 109600
Step 161: 109600 + 685 = 110285
Step 162: 110285 + 685 = 110970
Step 163: 110970 + 685 = 111655
Step 164: 111655 + 685 = 112340
Step 165: 112340 + 685 = 113025
Step 166: 113025 + 685 = 113710
Step 167: 113710 + 685 = 114395
Step 168: 114395 + 685 = 115080
Step 169: 115080 + 685 = 115765
Step 170: 115765 + 685 = 116450
Step 171: 116450 + 685 = 117135
Step 172: 117135 + 685 = 117820
Step 173: 117820 + 685 = 118505
Step 174: 118505 + 685 = 119190
Step 175: 119190 + 685 = 119875
Step 176: 119875 + 685 = 120560
Step 177: 120560 + 685 = 121245
Step 178: 121245 + 685 = 121930
Step 179: 121930 + 685 = 122615
Step 180: 122615 + 685 = 123300
Step 181: 123300 + 685 = 123985
Step 182: 123985 + 685 = 124670
Step 183: 124670 + 685 = 125355
Step 184: 125355 + 685 = 126040
Step 185: 126040 + 685 = 126725
Step 186: 126725 + 685 = 127410
Step 187: 127410 + 685 = 128095
Step 188: 128095 + 685 = 128780
Step 189: 128780 + 685 = 129465
Step 190: 129465 + 685 = 130150
Step 191: 130150 + 685 = 130835
Step 192: 130835 + 685 = 131520
Step 193: 131520 + 685 = 132205
Step 194: 132205 + 685 = 132890
Step 195: 132890 + 685 = 133575
Step 196: 133575 + 685 = 134260
Step 197: 134260 + 685 = 134945
Step 198: 134945 + 685 = 135630
Step 199: 135630 + 685 = 136315
Step 200: 136315 + 685 = 137000
Step 201: 137000 + 685 = 137685
Step 202: 137685 + 685 = 138370
Step 203: 138370 + 685 = 139055
Step 204: 139055 + 685 = 139740
Step 205: 139740 + 685 = 140425
Step 206: 140425 + 685 = 141110
Step 207: 141110 + 685 = 141795
Step 208: 141795 + 685 = 142480
Step 209: 142480 + 685 = 143165
Step 210: 143165 + 685 = 143850
Step 211: 143850 + 685 = 144535
Step 212: 144535 + 685 = 145220
Step 213: 145220 + 685 = 145905
Step 214: 145905 + 685 = 146590
Step 215: 146590 + 685 = 147275
Step 216: 147275 + 685 = 147960
Step 217: 147960 + 685 = 148645
Step 218: 148645 + 685 = 149330
Step 219: 149330 + 685 = 150015
Step 220: 150015 + 685 = 150700
Step 221: 150700 + 685 = 151385

So, 685*221 = 151385