Alright, let's solve this math problem step by step. First, we have the number 510. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 204. So, we're going to take the number 510 and add it to itself 204 times.
Step 1: 0 + 510 = 510
Step 2: 510 + 510 = 1020
Step 3: 1020 + 510 = 1530
Step 4: 1530 + 510 = 2040
Step 5: 2040 + 510 = 2550
Step 6: 2550 + 510 = 3060
Step 7: 3060 + 510 = 3570
Step 8: 3570 + 510 = 4080
Step 9: 4080 + 510 = 4590
Step 10: 4590 + 510 = 5100
Step 11: 5100 + 510 = 5610
Step 12: 5610 + 510 = 6120
Step 13: 6120 + 510 = 6630
Step 14: 6630 + 510 = 7140
Step 15: 7140 + 510 = 7650
Step 16: 7650 + 510 = 8160
Step 17: 8160 + 510 = 8670
Step 18: 8670 + 510 = 9180
Step 19: 9180 + 510 = 9690
Step 20: 9690 + 510 = 10200
Step 21: 10200 + 510 = 10710
Step 22: 10710 + 510 = 11220
Step 23: 11220 + 510 = 11730
Step 24: 11730 + 510 = 12240
Step 25: 12240 + 510 = 12750
Step 26: 12750 + 510 = 13260
Step 27: 13260 + 510 = 13770
Step 28: 13770 + 510 = 14280
Step 29: 14280 + 510 = 14790
Step 30: 14790 + 510 = 15300
Step 31: 15300 + 510 = 15810
Step 32: 15810 + 510 = 16320
Step 33: 16320 + 510 = 16830
Step 34: 16830 + 510 = 17340
Step 35: 17340 + 510 = 17850
Step 36: 17850 + 510 = 18360
Step 37: 18360 + 510 = 18870
Step 38: 18870 + 510 = 19380
Step 39: 19380 + 510 = 19890
Step 40: 19890 + 510 = 20400
Step 41: 20400 + 510 = 20910
Step 42: 20910 + 510 = 21420
Step 43: 21420 + 510 = 21930
Step 44: 21930 + 510 = 22440
Step 45: 22440 + 510 = 22950
Step 46: 22950 + 510 = 23460
Step 47: 23460 + 510 = 23970
Step 48: 23970 + 510 = 24480
Step 49: 24480 + 510 = 24990
Step 50: 24990 + 510 = 25500
Step 51: 25500 + 510 = 26010
Step 52: 26010 + 510 = 26520
Step 53: 26520 + 510 = 27030
Step 54: 27030 + 510 = 27540
Step 55: 27540 + 510 = 28050
Step 56: 28050 + 510 = 28560
Step 57: 28560 + 510 = 29070
Step 58: 29070 + 510 = 29580
Step 59: 29580 + 510 = 30090
Step 60: 30090 + 510 = 30600
Step 61: 30600 + 510 = 31110
Step 62: 31110 + 510 = 31620
Step 63: 31620 + 510 = 32130
Step 64: 32130 + 510 = 32640
Step 65: 32640 + 510 = 33150
Step 66: 33150 + 510 = 33660
Step 67: 33660 + 510 = 34170
Step 68: 34170 + 510 = 34680
Step 69: 34680 + 510 = 35190
Step 70: 35190 + 510 = 35700
Step 71: 35700 + 510 = 36210
Step 72: 36210 + 510 = 36720
Step 73: 36720 + 510 = 37230
Step 74: 37230 + 510 = 37740
Step 75: 37740 + 510 = 38250
Step 76: 38250 + 510 = 38760
Step 77: 38760 + 510 = 39270
Step 78: 39270 + 510 = 39780
Step 79: 39780 + 510 = 40290
Step 80: 40290 + 510 = 40800
Step 81: 40800 + 510 = 41310
Step 82: 41310 + 510 = 41820
Step 83: 41820 + 510 = 42330
Step 84: 42330 + 510 = 42840
Step 85: 42840 + 510 = 43350
Step 86: 43350 + 510 = 43860
Step 87: 43860 + 510 = 44370
Step 88: 44370 + 510 = 44880
Step 89: 44880 + 510 = 45390
Step 90: 45390 + 510 = 45900
Step 91: 45900 + 510 = 46410
Step 92: 46410 + 510 = 46920
Step 93: 46920 + 510 = 47430
Step 94: 47430 + 510 = 47940
Step 95: 47940 + 510 = 48450
Step 96: 48450 + 510 = 48960
Step 97: 48960 + 510 = 49470
Step 98: 49470 + 510 = 49980
Step 99: 49980 + 510 = 50490
Step 100: 50490 + 510 = 51000
Step 101: 51000 + 510 = 51510
Step 102: 51510 + 510 = 52020
Step 103: 52020 + 510 = 52530
Step 104: 52530 + 510 = 53040
Step 105: 53040 + 510 = 53550
Step 106: 53550 + 510 = 54060
Step 107: 54060 + 510 = 54570
Step 108: 54570 + 510 = 55080
Step 109: 55080 + 510 = 55590
Step 110: 55590 + 510 = 56100
Step 111: 56100 + 510 = 56610
Step 112: 56610 + 510 = 57120
Step 113: 57120 + 510 = 57630
Step 114: 57630 + 510 = 58140
Step 115: 58140 + 510 = 58650
Step 116: 58650 + 510 = 59160
Step 117: 59160 + 510 = 59670
Step 118: 59670 + 510 = 60180
Step 119: 60180 + 510 = 60690
Step 120: 60690 + 510 = 61200
Step 121: 61200 + 510 = 61710
Step 122: 61710 + 510 = 62220
Step 123: 62220 + 510 = 62730
Step 124: 62730 + 510 = 63240
Step 125: 63240 + 510 = 63750
Step 126: 63750 + 510 = 64260
Step 127: 64260 + 510 = 64770
Step 128: 64770 + 510 = 65280
Step 129: 65280 + 510 = 65790
Step 130: 65790 + 510 = 66300
Step 131: 66300 + 510 = 66810
Step 132: 66810 + 510 = 67320
Step 133: 67320 + 510 = 67830
Step 134: 67830 + 510 = 68340
Step 135: 68340 + 510 = 68850
Step 136: 68850 + 510 = 69360
Step 137: 69360 + 510 = 69870
Step 138: 69870 + 510 = 70380
Step 139: 70380 + 510 = 70890
Step 140: 70890 + 510 = 71400
Step 141: 71400 + 510 = 71910
Step 142: 71910 + 510 = 72420
Step 143: 72420 + 510 = 72930
Step 144: 72930 + 510 = 73440
Step 145: 73440 + 510 = 73950
Step 146: 73950 + 510 = 74460
Step 147: 74460 + 510 = 74970
Step 148: 74970 + 510 = 75480
Step 149: 75480 + 510 = 75990
Step 150: 75990 + 510 = 76500
Step 151: 76500 + 510 = 77010
Step 152: 77010 + 510 = 77520
Step 153: 77520 + 510 = 78030
Step 154: 78030 + 510 = 78540
Step 155: 78540 + 510 = 79050
Step 156: 79050 + 510 = 79560
Step 157: 79560 + 510 = 80070
Step 158: 80070 + 510 = 80580
Step 159: 80580 + 510 = 81090
Step 160: 81090 + 510 = 81600
Step 161: 81600 + 510 = 82110
Step 162: 82110 + 510 = 82620
Step 163: 82620 + 510 = 83130
Step 164: 83130 + 510 = 83640
Step 165: 83640 + 510 = 84150
Step 166: 84150 + 510 = 84660
Step 167: 84660 + 510 = 85170
Step 168: 85170 + 510 = 85680
Step 169: 85680 + 510 = 86190
Step 170: 86190 + 510 = 86700
Step 171: 86700 + 510 = 87210
Step 172: 87210 + 510 = 87720
Step 173: 87720 + 510 = 88230
Step 174: 88230 + 510 = 88740
Step 175: 88740 + 510 = 89250
Step 176: 89250 + 510 = 89760
Step 177: 89760 + 510 = 90270
Step 178: 90270 + 510 = 90780
Step 179: 90780 + 510 = 91290
Step 180: 91290 + 510 = 91800
Step 181: 91800 + 510 = 92310
Step 182: 92310 + 510 = 92820
Step 183: 92820 + 510 = 93330
Step 184: 93330 + 510 = 93840
Step 185: 93840 + 510 = 94350
Step 186: 94350 + 510 = 94860
Step 187: 94860 + 510 = 95370
Step 188: 95370 + 510 = 95880
Step 189: 95880 + 510 = 96390
Step 190: 96390 + 510 = 96900
Step 191: 96900 + 510 = 97410
Step 192: 97410 + 510 = 97920
Step 193: 97920 + 510 = 98430
Step 194: 98430 + 510 = 98940
Step 195: 98940 + 510 = 99450
Step 196: 99450 + 510 = 99960
Step 197: 99960 + 510 = 100470
Step 198: 100470 + 510 = 100980
Step 199: 100980 + 510 = 101490
Step 200: 101490 + 510 = 102000
Step 201: 102000 + 510 = 102510
Step 202: 102510 + 510 = 103020
Step 203: 103020 + 510 = 103530
Step 204: 103530 + 510 = 104040

So, 510*204 = 104040