Alright, let's solve this math problem step by step. First, we have the number 285. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 390. So, we're going to take the number 285 and add it to itself 390 times.
Step 1: 0 + 285 = 285
Step 2: 285 + 285 = 570
Step 3: 570 + 285 = 855
Step 4: 855 + 285 = 1140
Step 5: 1140 + 285 = 1425
Step 6: 1425 + 285 = 1710
Step 7: 1710 + 285 = 1995
Step 8: 1995 + 285 = 2280
Step 9: 2280 + 285 = 2565
Step 10: 2565 + 285 = 2850
Step 11: 2850 + 285 = 3135
Step 12: 3135 + 285 = 3420
Step 13: 3420 + 285 = 3705
Step 14: 3705 + 285 = 3990
Step 15: 3990 + 285 = 4275
Step 16: 4275 + 285 = 4560
Step 17: 4560 + 285 = 4845
Step 18: 4845 + 285 = 5130
Step 19: 5130 + 285 = 5415
Step 20: 5415 + 285 = 5700
Step 21: 5700 + 285 = 5985
Step 22: 5985 + 285 = 6270
Step 23: 6270 + 285 = 6555
Step 24: 6555 + 285 = 6840
Step 25: 6840 + 285 = 7125
Step 26: 7125 + 285 = 7410
Step 27: 7410 + 285 = 7695
Step 28: 7695 + 285 = 7980
Step 29: 7980 + 285 = 8265
Step 30: 8265 + 285 = 8550
Step 31: 8550 + 285 = 8835
Step 32: 8835 + 285 = 9120
Step 33: 9120 + 285 = 9405
Step 34: 9405 + 285 = 9690
Step 35: 9690 + 285 = 9975
Step 36: 9975 + 285 = 10260
Step 37: 10260 + 285 = 10545
Step 38: 10545 + 285 = 10830
Step 39: 10830 + 285 = 11115
Step 40: 11115 + 285 = 11400
Step 41: 11400 + 285 = 11685
Step 42: 11685 + 285 = 11970
Step 43: 11970 + 285 = 12255
Step 44: 12255 + 285 = 12540
Step 45: 12540 + 285 = 12825
Step 46: 12825 + 285 = 13110
Step 47: 13110 + 285 = 13395
Step 48: 13395 + 285 = 13680
Step 49: 13680 + 285 = 13965
Step 50: 13965 + 285 = 14250
Step 51: 14250 + 285 = 14535
Step 52: 14535 + 285 = 14820
Step 53: 14820 + 285 = 15105
Step 54: 15105 + 285 = 15390
Step 55: 15390 + 285 = 15675
Step 56: 15675 + 285 = 15960
Step 57: 15960 + 285 = 16245
Step 58: 16245 + 285 = 16530
Step 59: 16530 + 285 = 16815
Step 60: 16815 + 285 = 17100
Step 61: 17100 + 285 = 17385
Step 62: 17385 + 285 = 17670
Step 63: 17670 + 285 = 17955
Step 64: 17955 + 285 = 18240
Step 65: 18240 + 285 = 18525
Step 66: 18525 + 285 = 18810
Step 67: 18810 + 285 = 19095
Step 68: 19095 + 285 = 19380
Step 69: 19380 + 285 = 19665
Step 70: 19665 + 285 = 19950
Step 71: 19950 + 285 = 20235
Step 72: 20235 + 285 = 20520
Step 73: 20520 + 285 = 20805
Step 74: 20805 + 285 = 21090
Step 75: 21090 + 285 = 21375
Step 76: 21375 + 285 = 21660
Step 77: 21660 + 285 = 21945
Step 78: 21945 + 285 = 22230
Step 79: 22230 + 285 = 22515
Step 80: 22515 + 285 = 22800
Step 81: 22800 + 285 = 23085
Step 82: 23085 + 285 = 23370
Step 83: 23370 + 285 = 23655
Step 84: 23655 + 285 = 23940
Step 85: 23940 + 285 = 24225
Step 86: 24225 + 285 = 24510
Step 87: 24510 + 285 = 24795
Step 88: 24795 + 285 = 25080
Step 89: 25080 + 285 = 25365
Step 90: 25365 + 285 = 25650
Step 91: 25650 + 285 = 25935
Step 92: 25935 + 285 = 26220
Step 93: 26220 + 285 = 26505
Step 94: 26505 + 285 = 26790
Step 95: 26790 + 285 = 27075
Step 96: 27075 + 285 = 27360
Step 97: 27360 + 285 = 27645
Step 98: 27645 + 285 = 27930
Step 99: 27930 + 285 = 28215
Step 100: 28215 + 285 = 28500
Step 101: 28500 + 285 = 28785
Step 102: 28785 + 285 = 29070
Step 103: 29070 + 285 = 29355
Step 104: 29355 + 285 = 29640
Step 105: 29640 + 285 = 29925
Step 106: 29925 + 285 = 30210
Step 107: 30210 + 285 = 30495
Step 108: 30495 + 285 = 30780
Step 109: 30780 + 285 = 31065
Step 110: 31065 + 285 = 31350
Step 111: 31350 + 285 = 31635
Step 112: 31635 + 285 = 31920
Step 113: 31920 + 285 = 32205
Step 114: 32205 + 285 = 32490
Step 115: 32490 + 285 = 32775
Step 116: 32775 + 285 = 33060
Step 117: 33060 + 285 = 33345
Step 118: 33345 + 285 = 33630
Step 119: 33630 + 285 = 33915
Step 120: 33915 + 285 = 34200
Step 121: 34200 + 285 = 34485
Step 122: 34485 + 285 = 34770
Step 123: 34770 + 285 = 35055
Step 124: 35055 + 285 = 35340
Step 125: 35340 + 285 = 35625
Step 126: 35625 + 285 = 35910
Step 127: 35910 + 285 = 36195
Step 128: 36195 + 285 = 36480
Step 129: 36480 + 285 = 36765
Step 130: 36765 + 285 = 37050
Step 131: 37050 + 285 = 37335
Step 132: 37335 + 285 = 37620
Step 133: 37620 + 285 = 37905
Step 134: 37905 + 285 = 38190
Step 135: 38190 + 285 = 38475
Step 136: 38475 + 285 = 38760
Step 137: 38760 + 285 = 39045
Step 138: 39045 + 285 = 39330
Step 139: 39330 + 285 = 39615
Step 140: 39615 + 285 = 39900
Step 141: 39900 + 285 = 40185
Step 142: 40185 + 285 = 40470
Step 143: 40470 + 285 = 40755
Step 144: 40755 + 285 = 41040
Step 145: 41040 + 285 = 41325
Step 146: 41325 + 285 = 41610
Step 147: 41610 + 285 = 41895
Step 148: 41895 + 285 = 42180
Step 149: 42180 + 285 = 42465
Step 150: 42465 + 285 = 42750
Step 151: 42750 + 285 = 43035
Step 152: 43035 + 285 = 43320
Step 153: 43320 + 285 = 43605
Step 154: 43605 + 285 = 43890
Step 155: 43890 + 285 = 44175
Step 156: 44175 + 285 = 44460
Step 157: 44460 + 285 = 44745
Step 158: 44745 + 285 = 45030
Step 159: 45030 + 285 = 45315
Step 160: 45315 + 285 = 45600
Step 161: 45600 + 285 = 45885
Step 162: 45885 + 285 = 46170
Step 163: 46170 + 285 = 46455
Step 164: 46455 + 285 = 46740
Step 165: 46740 + 285 = 47025
Step 166: 47025 + 285 = 47310
Step 167: 47310 + 285 = 47595
Step 168: 47595 + 285 = 47880
Step 169: 47880 + 285 = 48165
Step 170: 48165 + 285 = 48450
Step 171: 48450 + 285 = 48735
Step 172: 48735 + 285 = 49020
Step 173: 49020 + 285 = 49305
Step 174: 49305 + 285 = 49590
Step 175: 49590 + 285 = 49875
Step 176: 49875 + 285 = 50160
Step 177: 50160 + 285 = 50445
Step 178: 50445 + 285 = 50730
Step 179: 50730 + 285 = 51015
Step 180: 51015 + 285 = 51300
Step 181: 51300 + 285 = 51585
Step 182: 51585 + 285 = 51870
Step 183: 51870 + 285 = 52155
Step 184: 52155 + 285 = 52440
Step 185: 52440 + 285 = 52725
Step 186: 52725 + 285 = 53010
Step 187: 53010 + 285 = 53295
Step 188: 53295 + 285 = 53580
Step 189: 53580 + 285 = 53865
Step 190: 53865 + 285 = 54150
Step 191: 54150 + 285 = 54435
Step 192: 54435 + 285 = 54720
Step 193: 54720 + 285 = 55005
Step 194: 55005 + 285 = 55290
Step 195: 55290 + 285 = 55575
Step 196: 55575 + 285 = 55860
Step 197: 55860 + 285 = 56145
Step 198: 56145 + 285 = 56430
Step 199: 56430 + 285 = 56715
Step 200: 56715 + 285 = 57000
Step 201: 57000 + 285 = 57285
Step 202: 57285 + 285 = 57570
Step 203: 57570 + 285 = 57855
Step 204: 57855 + 285 = 58140
Step 205: 58140 + 285 = 58425
Step 206: 58425 + 285 = 58710
Step 207: 58710 + 285 = 58995
Step 208: 58995 + 285 = 59280
Step 209: 59280 + 285 = 59565
Step 210: 59565 + 285 = 59850
Step 211: 59850 + 285 = 60135
Step 212: 60135 + 285 = 60420
Step 213: 60420 + 285 = 60705
Step 214: 60705 + 285 = 60990
Step 215: 60990 + 285 = 61275
Step 216: 61275 + 285 = 61560
Step 217: 61560 + 285 = 61845
Step 218: 61845 + 285 = 62130
Step 219: 62130 + 285 = 62415
Step 220: 62415 + 285 = 62700
Step 221: 62700 + 285 = 62985
Step 222: 62985 + 285 = 63270
Step 223: 63270 + 285 = 63555
Step 224: 63555 + 285 = 63840
Step 225: 63840 + 285 = 64125
Step 226: 64125 + 285 = 64410
Step 227: 64410 + 285 = 64695
Step 228: 64695 + 285 = 64980
Step 229: 64980 + 285 = 65265
Step 230: 65265 + 285 = 65550
Step 231: 65550 + 285 = 65835
Step 232: 65835 + 285 = 66120
Step 233: 66120 + 285 = 66405
Step 234: 66405 + 285 = 66690
Step 235: 66690 + 285 = 66975
Step 236: 66975 + 285 = 67260
Step 237: 67260 + 285 = 67545
Step 238: 67545 + 285 = 67830
Step 239: 67830 + 285 = 68115
Step 240: 68115 + 285 = 68400
Step 241: 68400 + 285 = 68685
Step 242: 68685 + 285 = 68970
Step 243: 68970 + 285 = 69255
Step 244: 69255 + 285 = 69540
Step 245: 69540 + 285 = 69825
Step 246: 69825 + 285 = 70110
Step 247: 70110 + 285 = 70395
Step 248: 70395 + 285 = 70680
Step 249: 70680 + 285 = 70965
Step 250: 70965 + 285 = 71250
Step 251: 71250 + 285 = 71535
Step 252: 71535 + 285 = 71820
Step 253: 71820 + 285 = 72105
Step 254: 72105 + 285 = 72390
Step 255: 72390 + 285 = 72675
Step 256: 72675 + 285 = 72960
Step 257: 72960 + 285 = 73245
Step 258: 73245 + 285 = 73530
Step 259: 73530 + 285 = 73815
Step 260: 73815 + 285 = 74100
Step 261: 74100 + 285 = 74385
Step 262: 74385 + 285 = 74670
Step 263: 74670 + 285 = 74955
Step 264: 74955 + 285 = 75240
Step 265: 75240 + 285 = 75525
Step 266: 75525 + 285 = 75810
Step 267: 75810 + 285 = 76095
Step 268: 76095 + 285 = 76380
Step 269: 76380 + 285 = 76665
Step 270: 76665 + 285 = 76950
Step 271: 76950 + 285 = 77235
Step 272: 77235 + 285 = 77520
Step 273: 77520 + 285 = 77805
Step 274: 77805 + 285 = 78090
Step 275: 78090 + 285 = 78375
Step 276: 78375 + 285 = 78660
Step 277: 78660 + 285 = 78945
Step 278: 78945 + 285 = 79230
Step 279: 79230 + 285 = 79515
Step 280: 79515 + 285 = 79800
Step 281: 79800 + 285 = 80085
Step 282: 80085 + 285 = 80370
Step 283: 80370 + 285 = 80655
Step 284: 80655 + 285 = 80940
Step 285: 80940 + 285 = 81225
Step 286: 81225 + 285 = 81510
Step 287: 81510 + 285 = 81795
Step 288: 81795 + 285 = 82080
Step 289: 82080 + 285 = 82365
Step 290: 82365 + 285 = 82650
Step 291: 82650 + 285 = 82935
Step 292: 82935 + 285 = 83220
Step 293: 83220 + 285 = 83505
Step 294: 83505 + 285 = 83790
Step 295: 83790 + 285 = 84075
Step 296: 84075 + 285 = 84360
Step 297: 84360 + 285 = 84645
Step 298: 84645 + 285 = 84930
Step 299: 84930 + 285 = 85215
Step 300: 85215 + 285 = 85500
Step 301: 85500 + 285 = 85785
Step 302: 85785 + 285 = 86070
Step 303: 86070 + 285 = 86355
Step 304: 86355 + 285 = 86640
Step 305: 86640 + 285 = 86925
Step 306: 86925 + 285 = 87210
Step 307: 87210 + 285 = 87495
Step 308: 87495 + 285 = 87780
Step 309: 87780 + 285 = 88065
Step 310: 88065 + 285 = 88350
Step 311: 88350 + 285 = 88635
Step 312: 88635 + 285 = 88920
Step 313: 88920 + 285 = 89205
Step 314: 89205 + 285 = 89490
Step 315: 89490 + 285 = 89775
Step 316: 89775 + 285 = 90060
Step 317: 90060 + 285 = 90345
Step 318: 90345 + 285 = 90630
Step 319: 90630 + 285 = 90915
Step 320: 90915 + 285 = 91200
Step 321: 91200 + 285 = 91485
Step 322: 91485 + 285 = 91770
Step 323: 91770 + 285 = 92055
Step 324: 92055 + 285 = 92340
Step 325: 92340 + 285 = 92625
Step 326: 92625 + 285 = 92910
Step 327: 92910 + 285 = 93195
Step 328: 93195 + 285 = 93480
Step 329: 93480 + 285 = 93765
Step 330: 93765 + 285 = 94050
Step 331: 94050 + 285 = 94335
Step 332: 94335 + 285 = 94620
Step 333: 94620 + 285 = 94905
Step 334: 94905 + 285 = 95190
Step 335: 95190 + 285 = 95475
Step 336: 95475 + 285 = 95760
Step 337: 95760 + 285 = 96045
Step 338: 96045 + 285 = 96330
Step 339: 96330 + 285 = 96615
Step 340: 96615 + 285 = 96900
Step 341: 96900 + 285 = 97185
Step 342: 97185 + 285 = 97470
Step 343: 97470 + 285 = 97755
Step 344: 97755 + 285 = 98040
Step 345: 98040 + 285 = 98325
Step 346: 98325 + 285 = 98610
Step 347: 98610 + 285 = 98895
Step 348: 98895 + 285 = 99180
Step 349: 99180 + 285 = 99465
Step 350: 99465 + 285 = 99750
Step 351: 99750 + 285 = 100035
Step 352: 100035 + 285 = 100320
Step 353: 100320 + 285 = 100605
Step 354: 100605 + 285 = 100890
Step 355: 100890 + 285 = 101175
Step 356: 101175 + 285 = 101460
Step 357: 101460 + 285 = 101745
Step 358: 101745 + 285 = 102030
Step 359: 102030 + 285 = 102315
Step 360: 102315 + 285 = 102600
Step 361: 102600 + 285 = 102885
Step 362: 102885 + 285 = 103170
Step 363: 103170 + 285 = 103455
Step 364: 103455 + 285 = 103740
Step 365: 103740 + 285 = 104025
Step 366: 104025 + 285 = 104310
Step 367: 104310 + 285 = 104595
Step 368: 104595 + 285 = 104880
Step 369: 104880 + 285 = 105165
Step 370: 105165 + 285 = 105450
Step 371: 105450 + 285 = 105735
Step 372: 105735 + 285 = 106020
Step 373: 106020 + 285 = 106305
Step 374: 106305 + 285 = 106590
Step 375: 106590 + 285 = 106875
Step 376: 106875 + 285 = 107160
Step 377: 107160 + 285 = 107445
Step 378: 107445 + 285 = 107730
Step 379: 107730 + 285 = 108015
Step 380: 108015 + 285 = 108300
Step 381: 108300 + 285 = 108585
Step 382: 108585 + 285 = 108870
Step 383: 108870 + 285 = 109155
Step 384: 109155 + 285 = 109440
Step 385: 109440 + 285 = 109725
Step 386: 109725 + 285 = 110010
Step 387: 110010 + 285 = 110295
Step 388: 110295 + 285 = 110580
Step 389: 110580 + 285 = 110865
Step 390: 110865 + 285 = 111150

So, 285*390 = 111150