Let's get this math done. We have 410 and we're going to multiply it by 205. This is the same as taking 410 and adding it to itself 205 times.
Step 1: 0 + 410 = 410
Step 2: 410 + 410 = 820
Step 3: 820 + 410 = 1230
Step 4: 1230 + 410 = 1640
Step 5: 1640 + 410 = 2050
Step 6: 2050 + 410 = 2460
Step 7: 2460 + 410 = 2870
Step 8: 2870 + 410 = 3280
Step 9: 3280 + 410 = 3690
Step 10: 3690 + 410 = 4100
Step 11: 4100 + 410 = 4510
Step 12: 4510 + 410 = 4920
Step 13: 4920 + 410 = 5330
Step 14: 5330 + 410 = 5740
Step 15: 5740 + 410 = 6150
Step 16: 6150 + 410 = 6560
Step 17: 6560 + 410 = 6970
Step 18: 6970 + 410 = 7380
Step 19: 7380 + 410 = 7790
Step 20: 7790 + 410 = 8200
Step 21: 8200 + 410 = 8610
Step 22: 8610 + 410 = 9020
Step 23: 9020 + 410 = 9430
Step 24: 9430 + 410 = 9840
Step 25: 9840 + 410 = 10250
Step 26: 10250 + 410 = 10660
Step 27: 10660 + 410 = 11070
Step 28: 11070 + 410 = 11480
Step 29: 11480 + 410 = 11890
Step 30: 11890 + 410 = 12300
Step 31: 12300 + 410 = 12710
Step 32: 12710 + 410 = 13120
Step 33: 13120 + 410 = 13530
Step 34: 13530 + 410 = 13940
Step 35: 13940 + 410 = 14350
Step 36: 14350 + 410 = 14760
Step 37: 14760 + 410 = 15170
Step 38: 15170 + 410 = 15580
Step 39: 15580 + 410 = 15990
Step 40: 15990 + 410 = 16400
Step 41: 16400 + 410 = 16810
Step 42: 16810 + 410 = 17220
Step 43: 17220 + 410 = 17630
Step 44: 17630 + 410 = 18040
Step 45: 18040 + 410 = 18450
Step 46: 18450 + 410 = 18860
Step 47: 18860 + 410 = 19270
Step 48: 19270 + 410 = 19680
Step 49: 19680 + 410 = 20090
Step 50: 20090 + 410 = 20500
Step 51: 20500 + 410 = 20910
Step 52: 20910 + 410 = 21320
Step 53: 21320 + 410 = 21730
Step 54: 21730 + 410 = 22140
Step 55: 22140 + 410 = 22550
Step 56: 22550 + 410 = 22960
Step 57: 22960 + 410 = 23370
Step 58: 23370 + 410 = 23780
Step 59: 23780 + 410 = 24190
Step 60: 24190 + 410 = 24600
Step 61: 24600 + 410 = 25010
Step 62: 25010 + 410 = 25420
Step 63: 25420 + 410 = 25830
Step 64: 25830 + 410 = 26240
Step 65: 26240 + 410 = 26650
Step 66: 26650 + 410 = 27060
Step 67: 27060 + 410 = 27470
Step 68: 27470 + 410 = 27880
Step 69: 27880 + 410 = 28290
Step 70: 28290 + 410 = 28700
Step 71: 28700 + 410 = 29110
Step 72: 29110 + 410 = 29520
Step 73: 29520 + 410 = 29930
Step 74: 29930 + 410 = 30340
Step 75: 30340 + 410 = 30750
Step 76: 30750 + 410 = 31160
Step 77: 31160 + 410 = 31570
Step 78: 31570 + 410 = 31980
Step 79: 31980 + 410 = 32390
Step 80: 32390 + 410 = 32800
Step 81: 32800 + 410 = 33210
Step 82: 33210 + 410 = 33620
Step 83: 33620 + 410 = 34030
Step 84: 34030 + 410 = 34440
Step 85: 34440 + 410 = 34850
Step 86: 34850 + 410 = 35260
Step 87: 35260 + 410 = 35670
Step 88: 35670 + 410 = 36080
Step 89: 36080 + 410 = 36490
Step 90: 36490 + 410 = 36900
Step 91: 36900 + 410 = 37310
Step 92: 37310 + 410 = 37720
Step 93: 37720 + 410 = 38130
Step 94: 38130 + 410 = 38540
Step 95: 38540 + 410 = 38950
Step 96: 38950 + 410 = 39360
Step 97: 39360 + 410 = 39770
Step 98: 39770 + 410 = 40180
Step 99: 40180 + 410 = 40590
Step 100: 40590 + 410 = 41000
Step 101: 41000 + 410 = 41410
Step 102: 41410 + 410 = 41820
Step 103: 41820 + 410 = 42230
Step 104: 42230 + 410 = 42640
Step 105: 42640 + 410 = 43050
Step 106: 43050 + 410 = 43460
Step 107: 43460 + 410 = 43870
Step 108: 43870 + 410 = 44280
Step 109: 44280 + 410 = 44690
Step 110: 44690 + 410 = 45100
Step 111: 45100 + 410 = 45510
Step 112: 45510 + 410 = 45920
Step 113: 45920 + 410 = 46330
Step 114: 46330 + 410 = 46740
Step 115: 46740 + 410 = 47150
Step 116: 47150 + 410 = 47560
Step 117: 47560 + 410 = 47970
Step 118: 47970 + 410 = 48380
Step 119: 48380 + 410 = 48790
Step 120: 48790 + 410 = 49200
Step 121: 49200 + 410 = 49610
Step 122: 49610 + 410 = 50020
Step 123: 50020 + 410 = 50430
Step 124: 50430 + 410 = 50840
Step 125: 50840 + 410 = 51250
Step 126: 51250 + 410 = 51660
Step 127: 51660 + 410 = 52070
Step 128: 52070 + 410 = 52480
Step 129: 52480 + 410 = 52890
Step 130: 52890 + 410 = 53300
Step 131: 53300 + 410 = 53710
Step 132: 53710 + 410 = 54120
Step 133: 54120 + 410 = 54530
Step 134: 54530 + 410 = 54940
Step 135: 54940 + 410 = 55350
Step 136: 55350 + 410 = 55760
Step 137: 55760 + 410 = 56170
Step 138: 56170 + 410 = 56580
Step 139: 56580 + 410 = 56990
Step 140: 56990 + 410 = 57400
Step 141: 57400 + 410 = 57810
Step 142: 57810 + 410 = 58220
Step 143: 58220 + 410 = 58630
Step 144: 58630 + 410 = 59040
Step 145: 59040 + 410 = 59450
Step 146: 59450 + 410 = 59860
Step 147: 59860 + 410 = 60270
Step 148: 60270 + 410 = 60680
Step 149: 60680 + 410 = 61090
Step 150: 61090 + 410 = 61500
Step 151: 61500 + 410 = 61910
Step 152: 61910 + 410 = 62320
Step 153: 62320 + 410 = 62730
Step 154: 62730 + 410 = 63140
Step 155: 63140 + 410 = 63550
Step 156: 63550 + 410 = 63960
Step 157: 63960 + 410 = 64370
Step 158: 64370 + 410 = 64780
Step 159: 64780 + 410 = 65190
Step 160: 65190 + 410 = 65600
Step 161: 65600 + 410 = 66010
Step 162: 66010 + 410 = 66420
Step 163: 66420 + 410 = 66830
Step 164: 66830 + 410 = 67240
Step 165: 67240 + 410 = 67650
Step 166: 67650 + 410 = 68060
Step 167: 68060 + 410 = 68470
Step 168: 68470 + 410 = 68880
Step 169: 68880 + 410 = 69290
Step 170: 69290 + 410 = 69700
Step 171: 69700 + 410 = 70110
Step 172: 70110 + 410 = 70520
Step 173: 70520 + 410 = 70930
Step 174: 70930 + 410 = 71340
Step 175: 71340 + 410 = 71750
Step 176: 71750 + 410 = 72160
Step 177: 72160 + 410 = 72570
Step 178: 72570 + 410 = 72980
Step 179: 72980 + 410 = 73390
Step 180: 73390 + 410 = 73800
Step 181: 73800 + 410 = 74210
Step 182: 74210 + 410 = 74620
Step 183: 74620 + 410 = 75030
Step 184: 75030 + 410 = 75440
Step 185: 75440 + 410 = 75850
Step 186: 75850 + 410 = 76260
Step 187: 76260 + 410 = 76670
Step 188: 76670 + 410 = 77080
Step 189: 77080 + 410 = 77490
Step 190: 77490 + 410 = 77900
Step 191: 77900 + 410 = 78310
Step 192: 78310 + 410 = 78720
Step 193: 78720 + 410 = 79130
Step 194: 79130 + 410 = 79540
Step 195: 79540 + 410 = 79950
Step 196: 79950 + 410 = 80360
Step 197: 80360 + 410 = 80770
Step 198: 80770 + 410 = 81180
Step 199: 81180 + 410 = 81590
Step 200: 81590 + 410 = 82000
Step 201: 82000 + 410 = 82410
Step 202: 82410 + 410 = 82820
Step 203: 82820 + 410 = 83230
Step 204: 83230 + 410 = 83640
Step 205: 83640 + 410 = 84050

So, 410*205 = 84050