Alright, let's solve this math problem step by step. First, we have the number 869. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 255. So, we're going to take the number 869 and add it to itself 255 times.
Step 1: 0 + 869 = 869
Step 2: 869 + 869 = 1738
Step 3: 1738 + 869 = 2607
Step 4: 2607 + 869 = 3476
Step 5: 3476 + 869 = 4345
Step 6: 4345 + 869 = 5214
Step 7: 5214 + 869 = 6083
Step 8: 6083 + 869 = 6952
Step 9: 6952 + 869 = 7821
Step 10: 7821 + 869 = 8690
Step 11: 8690 + 869 = 9559
Step 12: 9559 + 869 = 10428
Step 13: 10428 + 869 = 11297
Step 14: 11297 + 869 = 12166
Step 15: 12166 + 869 = 13035
Step 16: 13035 + 869 = 13904
Step 17: 13904 + 869 = 14773
Step 18: 14773 + 869 = 15642
Step 19: 15642 + 869 = 16511
Step 20: 16511 + 869 = 17380
Step 21: 17380 + 869 = 18249
Step 22: 18249 + 869 = 19118
Step 23: 19118 + 869 = 19987
Step 24: 19987 + 869 = 20856
Step 25: 20856 + 869 = 21725
Step 26: 21725 + 869 = 22594
Step 27: 22594 + 869 = 23463
Step 28: 23463 + 869 = 24332
Step 29: 24332 + 869 = 25201
Step 30: 25201 + 869 = 26070
Step 31: 26070 + 869 = 26939
Step 32: 26939 + 869 = 27808
Step 33: 27808 + 869 = 28677
Step 34: 28677 + 869 = 29546
Step 35: 29546 + 869 = 30415
Step 36: 30415 + 869 = 31284
Step 37: 31284 + 869 = 32153
Step 38: 32153 + 869 = 33022
Step 39: 33022 + 869 = 33891
Step 40: 33891 + 869 = 34760
Step 41: 34760 + 869 = 35629
Step 42: 35629 + 869 = 36498
Step 43: 36498 + 869 = 37367
Step 44: 37367 + 869 = 38236
Step 45: 38236 + 869 = 39105
Step 46: 39105 + 869 = 39974
Step 47: 39974 + 869 = 40843
Step 48: 40843 + 869 = 41712
Step 49: 41712 + 869 = 42581
Step 50: 42581 + 869 = 43450
Step 51: 43450 + 869 = 44319
Step 52: 44319 + 869 = 45188
Step 53: 45188 + 869 = 46057
Step 54: 46057 + 869 = 46926
Step 55: 46926 + 869 = 47795
Step 56: 47795 + 869 = 48664
Step 57: 48664 + 869 = 49533
Step 58: 49533 + 869 = 50402
Step 59: 50402 + 869 = 51271
Step 60: 51271 + 869 = 52140
Step 61: 52140 + 869 = 53009
Step 62: 53009 + 869 = 53878
Step 63: 53878 + 869 = 54747
Step 64: 54747 + 869 = 55616
Step 65: 55616 + 869 = 56485
Step 66: 56485 + 869 = 57354
Step 67: 57354 + 869 = 58223
Step 68: 58223 + 869 = 59092
Step 69: 59092 + 869 = 59961
Step 70: 59961 + 869 = 60830
Step 71: 60830 + 869 = 61699
Step 72: 61699 + 869 = 62568
Step 73: 62568 + 869 = 63437
Step 74: 63437 + 869 = 64306
Step 75: 64306 + 869 = 65175
Step 76: 65175 + 869 = 66044
Step 77: 66044 + 869 = 66913
Step 78: 66913 + 869 = 67782
Step 79: 67782 + 869 = 68651
Step 80: 68651 + 869 = 69520
Step 81: 69520 + 869 = 70389
Step 82: 70389 + 869 = 71258
Step 83: 71258 + 869 = 72127
Step 84: 72127 + 869 = 72996
Step 85: 72996 + 869 = 73865
Step 86: 73865 + 869 = 74734
Step 87: 74734 + 869 = 75603
Step 88: 75603 + 869 = 76472
Step 89: 76472 + 869 = 77341
Step 90: 77341 + 869 = 78210
Step 91: 78210 + 869 = 79079
Step 92: 79079 + 869 = 79948
Step 93: 79948 + 869 = 80817
Step 94: 80817 + 869 = 81686
Step 95: 81686 + 869 = 82555
Step 96: 82555 + 869 = 83424
Step 97: 83424 + 869 = 84293
Step 98: 84293 + 869 = 85162
Step 99: 85162 + 869 = 86031
Step 100: 86031 + 869 = 86900
Step 101: 86900 + 869 = 87769
Step 102: 87769 + 869 = 88638
Step 103: 88638 + 869 = 89507
Step 104: 89507 + 869 = 90376
Step 105: 90376 + 869 = 91245
Step 106: 91245 + 869 = 92114
Step 107: 92114 + 869 = 92983
Step 108: 92983 + 869 = 93852
Step 109: 93852 + 869 = 94721
Step 110: 94721 + 869 = 95590
Step 111: 95590 + 869 = 96459
Step 112: 96459 + 869 = 97328
Step 113: 97328 + 869 = 98197
Step 114: 98197 + 869 = 99066
Step 115: 99066 + 869 = 99935
Step 116: 99935 + 869 = 100804
Step 117: 100804 + 869 = 101673
Step 118: 101673 + 869 = 102542
Step 119: 102542 + 869 = 103411
Step 120: 103411 + 869 = 104280
Step 121: 104280 + 869 = 105149
Step 122: 105149 + 869 = 106018
Step 123: 106018 + 869 = 106887
Step 124: 106887 + 869 = 107756
Step 125: 107756 + 869 = 108625
Step 126: 108625 + 869 = 109494
Step 127: 109494 + 869 = 110363
Step 128: 110363 + 869 = 111232
Step 129: 111232 + 869 = 112101
Step 130: 112101 + 869 = 112970
Step 131: 112970 + 869 = 113839
Step 132: 113839 + 869 = 114708
Step 133: 114708 + 869 = 115577
Step 134: 115577 + 869 = 116446
Step 135: 116446 + 869 = 117315
Step 136: 117315 + 869 = 118184
Step 137: 118184 + 869 = 119053
Step 138: 119053 + 869 = 119922
Step 139: 119922 + 869 = 120791
Step 140: 120791 + 869 = 121660
Step 141: 121660 + 869 = 122529
Step 142: 122529 + 869 = 123398
Step 143: 123398 + 869 = 124267
Step 144: 124267 + 869 = 125136
Step 145: 125136 + 869 = 126005
Step 146: 126005 + 869 = 126874
Step 147: 126874 + 869 = 127743
Step 148: 127743 + 869 = 128612
Step 149: 128612 + 869 = 129481
Step 150: 129481 + 869 = 130350
Step 151: 130350 + 869 = 131219
Step 152: 131219 + 869 = 132088
Step 153: 132088 + 869 = 132957
Step 154: 132957 + 869 = 133826
Step 155: 133826 + 869 = 134695
Step 156: 134695 + 869 = 135564
Step 157: 135564 + 869 = 136433
Step 158: 136433 + 869 = 137302
Step 159: 137302 + 869 = 138171
Step 160: 138171 + 869 = 139040
Step 161: 139040 + 869 = 139909
Step 162: 139909 + 869 = 140778
Step 163: 140778 + 869 = 141647
Step 164: 141647 + 869 = 142516
Step 165: 142516 + 869 = 143385
Step 166: 143385 + 869 = 144254
Step 167: 144254 + 869 = 145123
Step 168: 145123 + 869 = 145992
Step 169: 145992 + 869 = 146861
Step 170: 146861 + 869 = 147730
Step 171: 147730 + 869 = 148599
Step 172: 148599 + 869 = 149468
Step 173: 149468 + 869 = 150337
Step 174: 150337 + 869 = 151206
Step 175: 151206 + 869 = 152075
Step 176: 152075 + 869 = 152944
Step 177: 152944 + 869 = 153813
Step 178: 153813 + 869 = 154682
Step 179: 154682 + 869 = 155551
Step 180: 155551 + 869 = 156420
Step 181: 156420 + 869 = 157289
Step 182: 157289 + 869 = 158158
Step 183: 158158 + 869 = 159027
Step 184: 159027 + 869 = 159896
Step 185: 159896 + 869 = 160765
Step 186: 160765 + 869 = 161634
Step 187: 161634 + 869 = 162503
Step 188: 162503 + 869 = 163372
Step 189: 163372 + 869 = 164241
Step 190: 164241 + 869 = 165110
Step 191: 165110 + 869 = 165979
Step 192: 165979 + 869 = 166848
Step 193: 166848 + 869 = 167717
Step 194: 167717 + 869 = 168586
Step 195: 168586 + 869 = 169455
Step 196: 169455 + 869 = 170324
Step 197: 170324 + 869 = 171193
Step 198: 171193 + 869 = 172062
Step 199: 172062 + 869 = 172931
Step 200: 172931 + 869 = 173800
Step 201: 173800 + 869 = 174669
Step 202: 174669 + 869 = 175538
Step 203: 175538 + 869 = 176407
Step 204: 176407 + 869 = 177276
Step 205: 177276 + 869 = 178145
Step 206: 178145 + 869 = 179014
Step 207: 179014 + 869 = 179883
Step 208: 179883 + 869 = 180752
Step 209: 180752 + 869 = 181621
Step 210: 181621 + 869 = 182490
Step 211: 182490 + 869 = 183359
Step 212: 183359 + 869 = 184228
Step 213: 184228 + 869 = 185097
Step 214: 185097 + 869 = 185966
Step 215: 185966 + 869 = 186835
Step 216: 186835 + 869 = 187704
Step 217: 187704 + 869 = 188573
Step 218: 188573 + 869 = 189442
Step 219: 189442 + 869 = 190311
Step 220: 190311 + 869 = 191180
Step 221: 191180 + 869 = 192049
Step 222: 192049 + 869 = 192918
Step 223: 192918 + 869 = 193787
Step 224: 193787 + 869 = 194656
Step 225: 194656 + 869 = 195525
Step 226: 195525 + 869 = 196394
Step 227: 196394 + 869 = 197263
Step 228: 197263 + 869 = 198132
Step 229: 198132 + 869 = 199001
Step 230: 199001 + 869 = 199870
Step 231: 199870 + 869 = 200739
Step 232: 200739 + 869 = 201608
Step 233: 201608 + 869 = 202477
Step 234: 202477 + 869 = 203346
Step 235: 203346 + 869 = 204215
Step 236: 204215 + 869 = 205084
Step 237: 205084 + 869 = 205953
Step 238: 205953 + 869 = 206822
Step 239: 206822 + 869 = 207691
Step 240: 207691 + 869 = 208560
Step 241: 208560 + 869 = 209429
Step 242: 209429 + 869 = 210298
Step 243: 210298 + 869 = 211167
Step 244: 211167 + 869 = 212036
Step 245: 212036 + 869 = 212905
Step 246: 212905 + 869 = 213774
Step 247: 213774 + 869 = 214643
Step 248: 214643 + 869 = 215512
Step 249: 215512 + 869 = 216381
Step 250: 216381 + 869 = 217250
Step 251: 217250 + 869 = 218119
Step 252: 218119 + 869 = 218988
Step 253: 218988 + 869 = 219857
Step 254: 219857 + 869 = 220726
Step 255: 220726 + 869 = 221595

So, 869*255 = 221595