OK, let's crack this. We're given 507 and our task is to multiply it by 320. Essentially, we'll be adding 507 to itself 320 times.
Step 1: 0 + 507 = 507
Step 2: 507 + 507 = 1014
Step 3: 1014 + 507 = 1521
Step 4: 1521 + 507 = 2028
Step 5: 2028 + 507 = 2535
Step 6: 2535 + 507 = 3042
Step 7: 3042 + 507 = 3549
Step 8: 3549 + 507 = 4056
Step 9: 4056 + 507 = 4563
Step 10: 4563 + 507 = 5070
Step 11: 5070 + 507 = 5577
Step 12: 5577 + 507 = 6084
Step 13: 6084 + 507 = 6591
Step 14: 6591 + 507 = 7098
Step 15: 7098 + 507 = 7605
Step 16: 7605 + 507 = 8112
Step 17: 8112 + 507 = 8619
Step 18: 8619 + 507 = 9126
Step 19: 9126 + 507 = 9633
Step 20: 9633 + 507 = 10140
Step 21: 10140 + 507 = 10647
Step 22: 10647 + 507 = 11154
Step 23: 11154 + 507 = 11661
Step 24: 11661 + 507 = 12168
Step 25: 12168 + 507 = 12675
Step 26: 12675 + 507 = 13182
Step 27: 13182 + 507 = 13689
Step 28: 13689 + 507 = 14196
Step 29: 14196 + 507 = 14703
Step 30: 14703 + 507 = 15210
Step 31: 15210 + 507 = 15717
Step 32: 15717 + 507 = 16224
Step 33: 16224 + 507 = 16731
Step 34: 16731 + 507 = 17238
Step 35: 17238 + 507 = 17745
Step 36: 17745 + 507 = 18252
Step 37: 18252 + 507 = 18759
Step 38: 18759 + 507 = 19266
Step 39: 19266 + 507 = 19773
Step 40: 19773 + 507 = 20280
Step 41: 20280 + 507 = 20787
Step 42: 20787 + 507 = 21294
Step 43: 21294 + 507 = 21801
Step 44: 21801 + 507 = 22308
Step 45: 22308 + 507 = 22815
Step 46: 22815 + 507 = 23322
Step 47: 23322 + 507 = 23829
Step 48: 23829 + 507 = 24336
Step 49: 24336 + 507 = 24843
Step 50: 24843 + 507 = 25350
Step 51: 25350 + 507 = 25857
Step 52: 25857 + 507 = 26364
Step 53: 26364 + 507 = 26871
Step 54: 26871 + 507 = 27378
Step 55: 27378 + 507 = 27885
Step 56: 27885 + 507 = 28392
Step 57: 28392 + 507 = 28899
Step 58: 28899 + 507 = 29406
Step 59: 29406 + 507 = 29913
Step 60: 29913 + 507 = 30420
Step 61: 30420 + 507 = 30927
Step 62: 30927 + 507 = 31434
Step 63: 31434 + 507 = 31941
Step 64: 31941 + 507 = 32448
Step 65: 32448 + 507 = 32955
Step 66: 32955 + 507 = 33462
Step 67: 33462 + 507 = 33969
Step 68: 33969 + 507 = 34476
Step 69: 34476 + 507 = 34983
Step 70: 34983 + 507 = 35490
Step 71: 35490 + 507 = 35997
Step 72: 35997 + 507 = 36504
Step 73: 36504 + 507 = 37011
Step 74: 37011 + 507 = 37518
Step 75: 37518 + 507 = 38025
Step 76: 38025 + 507 = 38532
Step 77: 38532 + 507 = 39039
Step 78: 39039 + 507 = 39546
Step 79: 39546 + 507 = 40053
Step 80: 40053 + 507 = 40560
Step 81: 40560 + 507 = 41067
Step 82: 41067 + 507 = 41574
Step 83: 41574 + 507 = 42081
Step 84: 42081 + 507 = 42588
Step 85: 42588 + 507 = 43095
Step 86: 43095 + 507 = 43602
Step 87: 43602 + 507 = 44109
Step 88: 44109 + 507 = 44616
Step 89: 44616 + 507 = 45123
Step 90: 45123 + 507 = 45630
Step 91: 45630 + 507 = 46137
Step 92: 46137 + 507 = 46644
Step 93: 46644 + 507 = 47151
Step 94: 47151 + 507 = 47658
Step 95: 47658 + 507 = 48165
Step 96: 48165 + 507 = 48672
Step 97: 48672 + 507 = 49179
Step 98: 49179 + 507 = 49686
Step 99: 49686 + 507 = 50193
Step 100: 50193 + 507 = 50700
Step 101: 50700 + 507 = 51207
Step 102: 51207 + 507 = 51714
Step 103: 51714 + 507 = 52221
Step 104: 52221 + 507 = 52728
Step 105: 52728 + 507 = 53235
Step 106: 53235 + 507 = 53742
Step 107: 53742 + 507 = 54249
Step 108: 54249 + 507 = 54756
Step 109: 54756 + 507 = 55263
Step 110: 55263 + 507 = 55770
Step 111: 55770 + 507 = 56277
Step 112: 56277 + 507 = 56784
Step 113: 56784 + 507 = 57291
Step 114: 57291 + 507 = 57798
Step 115: 57798 + 507 = 58305
Step 116: 58305 + 507 = 58812
Step 117: 58812 + 507 = 59319
Step 118: 59319 + 507 = 59826
Step 119: 59826 + 507 = 60333
Step 120: 60333 + 507 = 60840
Step 121: 60840 + 507 = 61347
Step 122: 61347 + 507 = 61854
Step 123: 61854 + 507 = 62361
Step 124: 62361 + 507 = 62868
Step 125: 62868 + 507 = 63375
Step 126: 63375 + 507 = 63882
Step 127: 63882 + 507 = 64389
Step 128: 64389 + 507 = 64896
Step 129: 64896 + 507 = 65403
Step 130: 65403 + 507 = 65910
Step 131: 65910 + 507 = 66417
Step 132: 66417 + 507 = 66924
Step 133: 66924 + 507 = 67431
Step 134: 67431 + 507 = 67938
Step 135: 67938 + 507 = 68445
Step 136: 68445 + 507 = 68952
Step 137: 68952 + 507 = 69459
Step 138: 69459 + 507 = 69966
Step 139: 69966 + 507 = 70473
Step 140: 70473 + 507 = 70980
Step 141: 70980 + 507 = 71487
Step 142: 71487 + 507 = 71994
Step 143: 71994 + 507 = 72501
Step 144: 72501 + 507 = 73008
Step 145: 73008 + 507 = 73515
Step 146: 73515 + 507 = 74022
Step 147: 74022 + 507 = 74529
Step 148: 74529 + 507 = 75036
Step 149: 75036 + 507 = 75543
Step 150: 75543 + 507 = 76050
Step 151: 76050 + 507 = 76557
Step 152: 76557 + 507 = 77064
Step 153: 77064 + 507 = 77571
Step 154: 77571 + 507 = 78078
Step 155: 78078 + 507 = 78585
Step 156: 78585 + 507 = 79092
Step 157: 79092 + 507 = 79599
Step 158: 79599 + 507 = 80106
Step 159: 80106 + 507 = 80613
Step 160: 80613 + 507 = 81120
Step 161: 81120 + 507 = 81627
Step 162: 81627 + 507 = 82134
Step 163: 82134 + 507 = 82641
Step 164: 82641 + 507 = 83148
Step 165: 83148 + 507 = 83655
Step 166: 83655 + 507 = 84162
Step 167: 84162 + 507 = 84669
Step 168: 84669 + 507 = 85176
Step 169: 85176 + 507 = 85683
Step 170: 85683 + 507 = 86190
Step 171: 86190 + 507 = 86697
Step 172: 86697 + 507 = 87204
Step 173: 87204 + 507 = 87711
Step 174: 87711 + 507 = 88218
Step 175: 88218 + 507 = 88725
Step 176: 88725 + 507 = 89232
Step 177: 89232 + 507 = 89739
Step 178: 89739 + 507 = 90246
Step 179: 90246 + 507 = 90753
Step 180: 90753 + 507 = 91260
Step 181: 91260 + 507 = 91767
Step 182: 91767 + 507 = 92274
Step 183: 92274 + 507 = 92781
Step 184: 92781 + 507 = 93288
Step 185: 93288 + 507 = 93795
Step 186: 93795 + 507 = 94302
Step 187: 94302 + 507 = 94809
Step 188: 94809 + 507 = 95316
Step 189: 95316 + 507 = 95823
Step 190: 95823 + 507 = 96330
Step 191: 96330 + 507 = 96837
Step 192: 96837 + 507 = 97344
Step 193: 97344 + 507 = 97851
Step 194: 97851 + 507 = 98358
Step 195: 98358 + 507 = 98865
Step 196: 98865 + 507 = 99372
Step 197: 99372 + 507 = 99879
Step 198: 99879 + 507 = 100386
Step 199: 100386 + 507 = 100893
Step 200: 100893 + 507 = 101400
Step 201: 101400 + 507 = 101907
Step 202: 101907 + 507 = 102414
Step 203: 102414 + 507 = 102921
Step 204: 102921 + 507 = 103428
Step 205: 103428 + 507 = 103935
Step 206: 103935 + 507 = 104442
Step 207: 104442 + 507 = 104949
Step 208: 104949 + 507 = 105456
Step 209: 105456 + 507 = 105963
Step 210: 105963 + 507 = 106470
Step 211: 106470 + 507 = 106977
Step 212: 106977 + 507 = 107484
Step 213: 107484 + 507 = 107991
Step 214: 107991 + 507 = 108498
Step 215: 108498 + 507 = 109005
Step 216: 109005 + 507 = 109512
Step 217: 109512 + 507 = 110019
Step 218: 110019 + 507 = 110526
Step 219: 110526 + 507 = 111033
Step 220: 111033 + 507 = 111540
Step 221: 111540 + 507 = 112047
Step 222: 112047 + 507 = 112554
Step 223: 112554 + 507 = 113061
Step 224: 113061 + 507 = 113568
Step 225: 113568 + 507 = 114075
Step 226: 114075 + 507 = 114582
Step 227: 114582 + 507 = 115089
Step 228: 115089 + 507 = 115596
Step 229: 115596 + 507 = 116103
Step 230: 116103 + 507 = 116610
Step 231: 116610 + 507 = 117117
Step 232: 117117 + 507 = 117624
Step 233: 117624 + 507 = 118131
Step 234: 118131 + 507 = 118638
Step 235: 118638 + 507 = 119145
Step 236: 119145 + 507 = 119652
Step 237: 119652 + 507 = 120159
Step 238: 120159 + 507 = 120666
Step 239: 120666 + 507 = 121173
Step 240: 121173 + 507 = 121680
Step 241: 121680 + 507 = 122187
Step 242: 122187 + 507 = 122694
Step 243: 122694 + 507 = 123201
Step 244: 123201 + 507 = 123708
Step 245: 123708 + 507 = 124215
Step 246: 124215 + 507 = 124722
Step 247: 124722 + 507 = 125229
Step 248: 125229 + 507 = 125736
Step 249: 125736 + 507 = 126243
Step 250: 126243 + 507 = 126750
Step 251: 126750 + 507 = 127257
Step 252: 127257 + 507 = 127764
Step 253: 127764 + 507 = 128271
Step 254: 128271 + 507 = 128778
Step 255: 128778 + 507 = 129285
Step 256: 129285 + 507 = 129792
Step 257: 129792 + 507 = 130299
Step 258: 130299 + 507 = 130806
Step 259: 130806 + 507 = 131313
Step 260: 131313 + 507 = 131820
Step 261: 131820 + 507 = 132327
Step 262: 132327 + 507 = 132834
Step 263: 132834 + 507 = 133341
Step 264: 133341 + 507 = 133848
Step 265: 133848 + 507 = 134355
Step 266: 134355 + 507 = 134862
Step 267: 134862 + 507 = 135369
Step 268: 135369 + 507 = 135876
Step 269: 135876 + 507 = 136383
Step 270: 136383 + 507 = 136890
Step 271: 136890 + 507 = 137397
Step 272: 137397 + 507 = 137904
Step 273: 137904 + 507 = 138411
Step 274: 138411 + 507 = 138918
Step 275: 138918 + 507 = 139425
Step 276: 139425 + 507 = 139932
Step 277: 139932 + 507 = 140439
Step 278: 140439 + 507 = 140946
Step 279: 140946 + 507 = 141453
Step 280: 141453 + 507 = 141960
Step 281: 141960 + 507 = 142467
Step 282: 142467 + 507 = 142974
Step 283: 142974 + 507 = 143481
Step 284: 143481 + 507 = 143988
Step 285: 143988 + 507 = 144495
Step 286: 144495 + 507 = 145002
Step 287: 145002 + 507 = 145509
Step 288: 145509 + 507 = 146016
Step 289: 146016 + 507 = 146523
Step 290: 146523 + 507 = 147030
Step 291: 147030 + 507 = 147537
Step 292: 147537 + 507 = 148044
Step 293: 148044 + 507 = 148551
Step 294: 148551 + 507 = 149058
Step 295: 149058 + 507 = 149565
Step 296: 149565 + 507 = 150072
Step 297: 150072 + 507 = 150579
Step 298: 150579 + 507 = 151086
Step 299: 151086 + 507 = 151593
Step 300: 151593 + 507 = 152100
Step 301: 152100 + 507 = 152607
Step 302: 152607 + 507 = 153114
Step 303: 153114 + 507 = 153621
Step 304: 153621 + 507 = 154128
Step 305: 154128 + 507 = 154635
Step 306: 154635 + 507 = 155142
Step 307: 155142 + 507 = 155649
Step 308: 155649 + 507 = 156156
Step 309: 156156 + 507 = 156663
Step 310: 156663 + 507 = 157170
Step 311: 157170 + 507 = 157677
Step 312: 157677 + 507 = 158184
Step 313: 158184 + 507 = 158691
Step 314: 158691 + 507 = 159198
Step 315: 159198 + 507 = 159705
Step 316: 159705 + 507 = 160212
Step 317: 160212 + 507 = 160719
Step 318: 160719 + 507 = 161226
Step 319: 161226 + 507 = 161733
Step 320: 161733 + 507 = 162240

So, 507*320 = 162240