Let's roll up our sleeves and solve this. We have 256 and we're going to multiply it by 321, essentially adding 256 to itself 321 times.
Step 1: 0 + 256 = 256
Step 2: 256 + 256 = 512
Step 3: 512 + 256 = 768
Step 4: 768 + 256 = 1024
Step 5: 1024 + 256 = 1280
Step 6: 1280 + 256 = 1536
Step 7: 1536 + 256 = 1792
Step 8: 1792 + 256 = 2048
Step 9: 2048 + 256 = 2304
Step 10: 2304 + 256 = 2560
Step 11: 2560 + 256 = 2816
Step 12: 2816 + 256 = 3072
Step 13: 3072 + 256 = 3328
Step 14: 3328 + 256 = 3584
Step 15: 3584 + 256 = 3840
Step 16: 3840 + 256 = 4096
Step 17: 4096 + 256 = 4352
Step 18: 4352 + 256 = 4608
Step 19: 4608 + 256 = 4864
Step 20: 4864 + 256 = 5120
Step 21: 5120 + 256 = 5376
Step 22: 5376 + 256 = 5632
Step 23: 5632 + 256 = 5888
Step 24: 5888 + 256 = 6144
Step 25: 6144 + 256 = 6400
Step 26: 6400 + 256 = 6656
Step 27: 6656 + 256 = 6912
Step 28: 6912 + 256 = 7168
Step 29: 7168 + 256 = 7424
Step 30: 7424 + 256 = 7680
Step 31: 7680 + 256 = 7936
Step 32: 7936 + 256 = 8192
Step 33: 8192 + 256 = 8448
Step 34: 8448 + 256 = 8704
Step 35: 8704 + 256 = 8960
Step 36: 8960 + 256 = 9216
Step 37: 9216 + 256 = 9472
Step 38: 9472 + 256 = 9728
Step 39: 9728 + 256 = 9984
Step 40: 9984 + 256 = 10240
Step 41: 10240 + 256 = 10496
Step 42: 10496 + 256 = 10752
Step 43: 10752 + 256 = 11008
Step 44: 11008 + 256 = 11264
Step 45: 11264 + 256 = 11520
Step 46: 11520 + 256 = 11776
Step 47: 11776 + 256 = 12032
Step 48: 12032 + 256 = 12288
Step 49: 12288 + 256 = 12544
Step 50: 12544 + 256 = 12800
Step 51: 12800 + 256 = 13056
Step 52: 13056 + 256 = 13312
Step 53: 13312 + 256 = 13568
Step 54: 13568 + 256 = 13824
Step 55: 13824 + 256 = 14080
Step 56: 14080 + 256 = 14336
Step 57: 14336 + 256 = 14592
Step 58: 14592 + 256 = 14848
Step 59: 14848 + 256 = 15104
Step 60: 15104 + 256 = 15360
Step 61: 15360 + 256 = 15616
Step 62: 15616 + 256 = 15872
Step 63: 15872 + 256 = 16128
Step 64: 16128 + 256 = 16384
Step 65: 16384 + 256 = 16640
Step 66: 16640 + 256 = 16896
Step 67: 16896 + 256 = 17152
Step 68: 17152 + 256 = 17408
Step 69: 17408 + 256 = 17664
Step 70: 17664 + 256 = 17920
Step 71: 17920 + 256 = 18176
Step 72: 18176 + 256 = 18432
Step 73: 18432 + 256 = 18688
Step 74: 18688 + 256 = 18944
Step 75: 18944 + 256 = 19200
Step 76: 19200 + 256 = 19456
Step 77: 19456 + 256 = 19712
Step 78: 19712 + 256 = 19968
Step 79: 19968 + 256 = 20224
Step 80: 20224 + 256 = 20480
Step 81: 20480 + 256 = 20736
Step 82: 20736 + 256 = 20992
Step 83: 20992 + 256 = 21248
Step 84: 21248 + 256 = 21504
Step 85: 21504 + 256 = 21760
Step 86: 21760 + 256 = 22016
Step 87: 22016 + 256 = 22272
Step 88: 22272 + 256 = 22528
Step 89: 22528 + 256 = 22784
Step 90: 22784 + 256 = 23040
Step 91: 23040 + 256 = 23296
Step 92: 23296 + 256 = 23552
Step 93: 23552 + 256 = 23808
Step 94: 23808 + 256 = 24064
Step 95: 24064 + 256 = 24320
Step 96: 24320 + 256 = 24576
Step 97: 24576 + 256 = 24832
Step 98: 24832 + 256 = 25088
Step 99: 25088 + 256 = 25344
Step 100: 25344 + 256 = 25600
Step 101: 25600 + 256 = 25856
Step 102: 25856 + 256 = 26112
Step 103: 26112 + 256 = 26368
Step 104: 26368 + 256 = 26624
Step 105: 26624 + 256 = 26880
Step 106: 26880 + 256 = 27136
Step 107: 27136 + 256 = 27392
Step 108: 27392 + 256 = 27648
Step 109: 27648 + 256 = 27904
Step 110: 27904 + 256 = 28160
Step 111: 28160 + 256 = 28416
Step 112: 28416 + 256 = 28672
Step 113: 28672 + 256 = 28928
Step 114: 28928 + 256 = 29184
Step 115: 29184 + 256 = 29440
Step 116: 29440 + 256 = 29696
Step 117: 29696 + 256 = 29952
Step 118: 29952 + 256 = 30208
Step 119: 30208 + 256 = 30464
Step 120: 30464 + 256 = 30720
Step 121: 30720 + 256 = 30976
Step 122: 30976 + 256 = 31232
Step 123: 31232 + 256 = 31488
Step 124: 31488 + 256 = 31744
Step 125: 31744 + 256 = 32000
Step 126: 32000 + 256 = 32256
Step 127: 32256 + 256 = 32512
Step 128: 32512 + 256 = 32768
Step 129: 32768 + 256 = 33024
Step 130: 33024 + 256 = 33280
Step 131: 33280 + 256 = 33536
Step 132: 33536 + 256 = 33792
Step 133: 33792 + 256 = 34048
Step 134: 34048 + 256 = 34304
Step 135: 34304 + 256 = 34560
Step 136: 34560 + 256 = 34816
Step 137: 34816 + 256 = 35072
Step 138: 35072 + 256 = 35328
Step 139: 35328 + 256 = 35584
Step 140: 35584 + 256 = 35840
Step 141: 35840 + 256 = 36096
Step 142: 36096 + 256 = 36352
Step 143: 36352 + 256 = 36608
Step 144: 36608 + 256 = 36864
Step 145: 36864 + 256 = 37120
Step 146: 37120 + 256 = 37376
Step 147: 37376 + 256 = 37632
Step 148: 37632 + 256 = 37888
Step 149: 37888 + 256 = 38144
Step 150: 38144 + 256 = 38400
Step 151: 38400 + 256 = 38656
Step 152: 38656 + 256 = 38912
Step 153: 38912 + 256 = 39168
Step 154: 39168 + 256 = 39424
Step 155: 39424 + 256 = 39680
Step 156: 39680 + 256 = 39936
Step 157: 39936 + 256 = 40192
Step 158: 40192 + 256 = 40448
Step 159: 40448 + 256 = 40704
Step 160: 40704 + 256 = 40960
Step 161: 40960 + 256 = 41216
Step 162: 41216 + 256 = 41472
Step 163: 41472 + 256 = 41728
Step 164: 41728 + 256 = 41984
Step 165: 41984 + 256 = 42240
Step 166: 42240 + 256 = 42496
Step 167: 42496 + 256 = 42752
Step 168: 42752 + 256 = 43008
Step 169: 43008 + 256 = 43264
Step 170: 43264 + 256 = 43520
Step 171: 43520 + 256 = 43776
Step 172: 43776 + 256 = 44032
Step 173: 44032 + 256 = 44288
Step 174: 44288 + 256 = 44544
Step 175: 44544 + 256 = 44800
Step 176: 44800 + 256 = 45056
Step 177: 45056 + 256 = 45312
Step 178: 45312 + 256 = 45568
Step 179: 45568 + 256 = 45824
Step 180: 45824 + 256 = 46080
Step 181: 46080 + 256 = 46336
Step 182: 46336 + 256 = 46592
Step 183: 46592 + 256 = 46848
Step 184: 46848 + 256 = 47104
Step 185: 47104 + 256 = 47360
Step 186: 47360 + 256 = 47616
Step 187: 47616 + 256 = 47872
Step 188: 47872 + 256 = 48128
Step 189: 48128 + 256 = 48384
Step 190: 48384 + 256 = 48640
Step 191: 48640 + 256 = 48896
Step 192: 48896 + 256 = 49152
Step 193: 49152 + 256 = 49408
Step 194: 49408 + 256 = 49664
Step 195: 49664 + 256 = 49920
Step 196: 49920 + 256 = 50176
Step 197: 50176 + 256 = 50432
Step 198: 50432 + 256 = 50688
Step 199: 50688 + 256 = 50944
Step 200: 50944 + 256 = 51200
Step 201: 51200 + 256 = 51456
Step 202: 51456 + 256 = 51712
Step 203: 51712 + 256 = 51968
Step 204: 51968 + 256 = 52224
Step 205: 52224 + 256 = 52480
Step 206: 52480 + 256 = 52736
Step 207: 52736 + 256 = 52992
Step 208: 52992 + 256 = 53248
Step 209: 53248 + 256 = 53504
Step 210: 53504 + 256 = 53760
Step 211: 53760 + 256 = 54016
Step 212: 54016 + 256 = 54272
Step 213: 54272 + 256 = 54528
Step 214: 54528 + 256 = 54784
Step 215: 54784 + 256 = 55040
Step 216: 55040 + 256 = 55296
Step 217: 55296 + 256 = 55552
Step 218: 55552 + 256 = 55808
Step 219: 55808 + 256 = 56064
Step 220: 56064 + 256 = 56320
Step 221: 56320 + 256 = 56576
Step 222: 56576 + 256 = 56832
Step 223: 56832 + 256 = 57088
Step 224: 57088 + 256 = 57344
Step 225: 57344 + 256 = 57600
Step 226: 57600 + 256 = 57856
Step 227: 57856 + 256 = 58112
Step 228: 58112 + 256 = 58368
Step 229: 58368 + 256 = 58624
Step 230: 58624 + 256 = 58880
Step 231: 58880 + 256 = 59136
Step 232: 59136 + 256 = 59392
Step 233: 59392 + 256 = 59648
Step 234: 59648 + 256 = 59904
Step 235: 59904 + 256 = 60160
Step 236: 60160 + 256 = 60416
Step 237: 60416 + 256 = 60672
Step 238: 60672 + 256 = 60928
Step 239: 60928 + 256 = 61184
Step 240: 61184 + 256 = 61440
Step 241: 61440 + 256 = 61696
Step 242: 61696 + 256 = 61952
Step 243: 61952 + 256 = 62208
Step 244: 62208 + 256 = 62464
Step 245: 62464 + 256 = 62720
Step 246: 62720 + 256 = 62976
Step 247: 62976 + 256 = 63232
Step 248: 63232 + 256 = 63488
Step 249: 63488 + 256 = 63744
Step 250: 63744 + 256 = 64000
Step 251: 64000 + 256 = 64256
Step 252: 64256 + 256 = 64512
Step 253: 64512 + 256 = 64768
Step 254: 64768 + 256 = 65024
Step 255: 65024 + 256 = 65280
Step 256: 65280 + 256 = 65536
Step 257: 65536 + 256 = 65792
Step 258: 65792 + 256 = 66048
Step 259: 66048 + 256 = 66304
Step 260: 66304 + 256 = 66560
Step 261: 66560 + 256 = 66816
Step 262: 66816 + 256 = 67072
Step 263: 67072 + 256 = 67328
Step 264: 67328 + 256 = 67584
Step 265: 67584 + 256 = 67840
Step 266: 67840 + 256 = 68096
Step 267: 68096 + 256 = 68352
Step 268: 68352 + 256 = 68608
Step 269: 68608 + 256 = 68864
Step 270: 68864 + 256 = 69120
Step 271: 69120 + 256 = 69376
Step 272: 69376 + 256 = 69632
Step 273: 69632 + 256 = 69888
Step 274: 69888 + 256 = 70144
Step 275: 70144 + 256 = 70400
Step 276: 70400 + 256 = 70656
Step 277: 70656 + 256 = 70912
Step 278: 70912 + 256 = 71168
Step 279: 71168 + 256 = 71424
Step 280: 71424 + 256 = 71680
Step 281: 71680 + 256 = 71936
Step 282: 71936 + 256 = 72192
Step 283: 72192 + 256 = 72448
Step 284: 72448 + 256 = 72704
Step 285: 72704 + 256 = 72960
Step 286: 72960 + 256 = 73216
Step 287: 73216 + 256 = 73472
Step 288: 73472 + 256 = 73728
Step 289: 73728 + 256 = 73984
Step 290: 73984 + 256 = 74240
Step 291: 74240 + 256 = 74496
Step 292: 74496 + 256 = 74752
Step 293: 74752 + 256 = 75008
Step 294: 75008 + 256 = 75264
Step 295: 75264 + 256 = 75520
Step 296: 75520 + 256 = 75776
Step 297: 75776 + 256 = 76032
Step 298: 76032 + 256 = 76288
Step 299: 76288 + 256 = 76544
Step 300: 76544 + 256 = 76800
Step 301: 76800 + 256 = 77056
Step 302: 77056 + 256 = 77312
Step 303: 77312 + 256 = 77568
Step 304: 77568 + 256 = 77824
Step 305: 77824 + 256 = 78080
Step 306: 78080 + 256 = 78336
Step 307: 78336 + 256 = 78592
Step 308: 78592 + 256 = 78848
Step 309: 78848 + 256 = 79104
Step 310: 79104 + 256 = 79360
Step 311: 79360 + 256 = 79616
Step 312: 79616 + 256 = 79872
Step 313: 79872 + 256 = 80128
Step 314: 80128 + 256 = 80384
Step 315: 80384 + 256 = 80640
Step 316: 80640 + 256 = 80896
Step 317: 80896 + 256 = 81152
Step 318: 81152 + 256 = 81408
Step 319: 81408 + 256 = 81664
Step 320: 81664 + 256 = 81920
Step 321: 81920 + 256 = 82176

So, 256*321 = 82176