Let's roll up our sleeves and solve this. We have 5 and we're going to multiply it by 491, essentially adding 5 to itself 491 times.
Step 1: 0 + 5 = 5
Step 2: 5 + 5 = 10
Step 3: 10 + 5 = 15
Step 4: 15 + 5 = 20
Step 5: 20 + 5 = 25
Step 6: 25 + 5 = 30
Step 7: 30 + 5 = 35
Step 8: 35 + 5 = 40
Step 9: 40 + 5 = 45
Step 10: 45 + 5 = 50
Step 11: 50 + 5 = 55
Step 12: 55 + 5 = 60
Step 13: 60 + 5 = 65
Step 14: 65 + 5 = 70
Step 15: 70 + 5 = 75
Step 16: 75 + 5 = 80
Step 17: 80 + 5 = 85
Step 18: 85 + 5 = 90
Step 19: 90 + 5 = 95
Step 20: 95 + 5 = 100
Step 21: 100 + 5 = 105
Step 22: 105 + 5 = 110
Step 23: 110 + 5 = 115
Step 24: 115 + 5 = 120
Step 25: 120 + 5 = 125
Step 26: 125 + 5 = 130
Step 27: 130 + 5 = 135
Step 28: 135 + 5 = 140
Step 29: 140 + 5 = 145
Step 30: 145 + 5 = 150
Step 31: 150 + 5 = 155
Step 32: 155 + 5 = 160
Step 33: 160 + 5 = 165
Step 34: 165 + 5 = 170
Step 35: 170 + 5 = 175
Step 36: 175 + 5 = 180
Step 37: 180 + 5 = 185
Step 38: 185 + 5 = 190
Step 39: 190 + 5 = 195
Step 40: 195 + 5 = 200
Step 41: 200 + 5 = 205
Step 42: 205 + 5 = 210
Step 43: 210 + 5 = 215
Step 44: 215 + 5 = 220
Step 45: 220 + 5 = 225
Step 46: 225 + 5 = 230
Step 47: 230 + 5 = 235
Step 48: 235 + 5 = 240
Step 49: 240 + 5 = 245
Step 50: 245 + 5 = 250
Step 51: 250 + 5 = 255
Step 52: 255 + 5 = 260
Step 53: 260 + 5 = 265
Step 54: 265 + 5 = 270
Step 55: 270 + 5 = 275
Step 56: 275 + 5 = 280
Step 57: 280 + 5 = 285
Step 58: 285 + 5 = 290
Step 59: 290 + 5 = 295
Step 60: 295 + 5 = 300
Step 61: 300 + 5 = 305
Step 62: 305 + 5 = 310
Step 63: 310 + 5 = 315
Step 64: 315 + 5 = 320
Step 65: 320 + 5 = 325
Step 66: 325 + 5 = 330
Step 67: 330 + 5 = 335
Step 68: 335 + 5 = 340
Step 69: 340 + 5 = 345
Step 70: 345 + 5 = 350
Step 71: 350 + 5 = 355
Step 72: 355 + 5 = 360
Step 73: 360 + 5 = 365
Step 74: 365 + 5 = 370
Step 75: 370 + 5 = 375
Step 76: 375 + 5 = 380
Step 77: 380 + 5 = 385
Step 78: 385 + 5 = 390
Step 79: 390 + 5 = 395
Step 80: 395 + 5 = 400
Step 81: 400 + 5 = 405
Step 82: 405 + 5 = 410
Step 83: 410 + 5 = 415
Step 84: 415 + 5 = 420
Step 85: 420 + 5 = 425
Step 86: 425 + 5 = 430
Step 87: 430 + 5 = 435
Step 88: 435 + 5 = 440
Step 89: 440 + 5 = 445
Step 90: 445 + 5 = 450
Step 91: 450 + 5 = 455
Step 92: 455 + 5 = 460
Step 93: 460 + 5 = 465
Step 94: 465 + 5 = 470
Step 95: 470 + 5 = 475
Step 96: 475 + 5 = 480
Step 97: 480 + 5 = 485
Step 98: 485 + 5 = 490
Step 99: 490 + 5 = 495
Step 100: 495 + 5 = 500
Step 101: 500 + 5 = 505
Step 102: 505 + 5 = 510
Step 103: 510 + 5 = 515
Step 104: 515 + 5 = 520
Step 105: 520 + 5 = 525
Step 106: 525 + 5 = 530
Step 107: 530 + 5 = 535
Step 108: 535 + 5 = 540
Step 109: 540 + 5 = 545
Step 110: 545 + 5 = 550
Step 111: 550 + 5 = 555
Step 112: 555 + 5 = 560
Step 113: 560 + 5 = 565
Step 114: 565 + 5 = 570
Step 115: 570 + 5 = 575
Step 116: 575 + 5 = 580
Step 117: 580 + 5 = 585
Step 118: 585 + 5 = 590
Step 119: 590 + 5 = 595
Step 120: 595 + 5 = 600
Step 121: 600 + 5 = 605
Step 122: 605 + 5 = 610
Step 123: 610 + 5 = 615
Step 124: 615 + 5 = 620
Step 125: 620 + 5 = 625
Step 126: 625 + 5 = 630
Step 127: 630 + 5 = 635
Step 128: 635 + 5 = 640
Step 129: 640 + 5 = 645
Step 130: 645 + 5 = 650
Step 131: 650 + 5 = 655
Step 132: 655 + 5 = 660
Step 133: 660 + 5 = 665
Step 134: 665 + 5 = 670
Step 135: 670 + 5 = 675
Step 136: 675 + 5 = 680
Step 137: 680 + 5 = 685
Step 138: 685 + 5 = 690
Step 139: 690 + 5 = 695
Step 140: 695 + 5 = 700
Step 141: 700 + 5 = 705
Step 142: 705 + 5 = 710
Step 143: 710 + 5 = 715
Step 144: 715 + 5 = 720
Step 145: 720 + 5 = 725
Step 146: 725 + 5 = 730
Step 147: 730 + 5 = 735
Step 148: 735 + 5 = 740
Step 149: 740 + 5 = 745
Step 150: 745 + 5 = 750
Step 151: 750 + 5 = 755
Step 152: 755 + 5 = 760
Step 153: 760 + 5 = 765
Step 154: 765 + 5 = 770
Step 155: 770 + 5 = 775
Step 156: 775 + 5 = 780
Step 157: 780 + 5 = 785
Step 158: 785 + 5 = 790
Step 159: 790 + 5 = 795
Step 160: 795 + 5 = 800
Step 161: 800 + 5 = 805
Step 162: 805 + 5 = 810
Step 163: 810 + 5 = 815
Step 164: 815 + 5 = 820
Step 165: 820 + 5 = 825
Step 166: 825 + 5 = 830
Step 167: 830 + 5 = 835
Step 168: 835 + 5 = 840
Step 169: 840 + 5 = 845
Step 170: 845 + 5 = 850
Step 171: 850 + 5 = 855
Step 172: 855 + 5 = 860
Step 173: 860 + 5 = 865
Step 174: 865 + 5 = 870
Step 175: 870 + 5 = 875
Step 176: 875 + 5 = 880
Step 177: 880 + 5 = 885
Step 178: 885 + 5 = 890
Step 179: 890 + 5 = 895
Step 180: 895 + 5 = 900
Step 181: 900 + 5 = 905
Step 182: 905 + 5 = 910
Step 183: 910 + 5 = 915
Step 184: 915 + 5 = 920
Step 185: 920 + 5 = 925
Step 186: 925 + 5 = 930
Step 187: 930 + 5 = 935
Step 188: 935 + 5 = 940
Step 189: 940 + 5 = 945
Step 190: 945 + 5 = 950
Step 191: 950 + 5 = 955
Step 192: 955 + 5 = 960
Step 193: 960 + 5 = 965
Step 194: 965 + 5 = 970
Step 195: 970 + 5 = 975
Step 196: 975 + 5 = 980
Step 197: 980 + 5 = 985
Step 198: 985 + 5 = 990
Step 199: 990 + 5 = 995
Step 200: 995 + 5 = 1000
Step 201: 1000 + 5 = 1005
Step 202: 1005 + 5 = 1010
Step 203: 1010 + 5 = 1015
Step 204: 1015 + 5 = 1020
Step 205: 1020 + 5 = 1025
Step 206: 1025 + 5 = 1030
Step 207: 1030 + 5 = 1035
Step 208: 1035 + 5 = 1040
Step 209: 1040 + 5 = 1045
Step 210: 1045 + 5 = 1050
Step 211: 1050 + 5 = 1055
Step 212: 1055 + 5 = 1060
Step 213: 1060 + 5 = 1065
Step 214: 1065 + 5 = 1070
Step 215: 1070 + 5 = 1075
Step 216: 1075 + 5 = 1080
Step 217: 1080 + 5 = 1085
Step 218: 1085 + 5 = 1090
Step 219: 1090 + 5 = 1095
Step 220: 1095 + 5 = 1100
Step 221: 1100 + 5 = 1105
Step 222: 1105 + 5 = 1110
Step 223: 1110 + 5 = 1115
Step 224: 1115 + 5 = 1120
Step 225: 1120 + 5 = 1125
Step 226: 1125 + 5 = 1130
Step 227: 1130 + 5 = 1135
Step 228: 1135 + 5 = 1140
Step 229: 1140 + 5 = 1145
Step 230: 1145 + 5 = 1150
Step 231: 1150 + 5 = 1155
Step 232: 1155 + 5 = 1160
Step 233: 1160 + 5 = 1165
Step 234: 1165 + 5 = 1170
Step 235: 1170 + 5 = 1175
Step 236: 1175 + 5 = 1180
Step 237: 1180 + 5 = 1185
Step 238: 1185 + 5 = 1190
Step 239: 1190 + 5 = 1195
Step 240: 1195 + 5 = 1200
Step 241: 1200 + 5 = 1205
Step 242: 1205 + 5 = 1210
Step 243: 1210 + 5 = 1215
Step 244: 1215 + 5 = 1220
Step 245: 1220 + 5 = 1225
Step 246: 1225 + 5 = 1230
Step 247: 1230 + 5 = 1235
Step 248: 1235 + 5 = 1240
Step 249: 1240 + 5 = 1245
Step 250: 1245 + 5 = 1250
Step 251: 1250 + 5 = 1255
Step 252: 1255 + 5 = 1260
Step 253: 1260 + 5 = 1265
Step 254: 1265 + 5 = 1270
Step 255: 1270 + 5 = 1275
Step 256: 1275 + 5 = 1280
Step 257: 1280 + 5 = 1285
Step 258: 1285 + 5 = 1290
Step 259: 1290 + 5 = 1295
Step 260: 1295 + 5 = 1300
Step 261: 1300 + 5 = 1305
Step 262: 1305 + 5 = 1310
Step 263: 1310 + 5 = 1315
Step 264: 1315 + 5 = 1320
Step 265: 1320 + 5 = 1325
Step 266: 1325 + 5 = 1330
Step 267: 1330 + 5 = 1335
Step 268: 1335 + 5 = 1340
Step 269: 1340 + 5 = 1345
Step 270: 1345 + 5 = 1350
Step 271: 1350 + 5 = 1355
Step 272: 1355 + 5 = 1360
Step 273: 1360 + 5 = 1365
Step 274: 1365 + 5 = 1370
Step 275: 1370 + 5 = 1375
Step 276: 1375 + 5 = 1380
Step 277: 1380 + 5 = 1385
Step 278: 1385 + 5 = 1390
Step 279: 1390 + 5 = 1395
Step 280: 1395 + 5 = 1400
Step 281: 1400 + 5 = 1405
Step 282: 1405 + 5 = 1410
Step 283: 1410 + 5 = 1415
Step 284: 1415 + 5 = 1420
Step 285: 1420 + 5 = 1425
Step 286: 1425 + 5 = 1430
Step 287: 1430 + 5 = 1435
Step 288: 1435 + 5 = 1440
Step 289: 1440 + 5 = 1445
Step 290: 1445 + 5 = 1450
Step 291: 1450 + 5 = 1455
Step 292: 1455 + 5 = 1460
Step 293: 1460 + 5 = 1465
Step 294: 1465 + 5 = 1470
Step 295: 1470 + 5 = 1475
Step 296: 1475 + 5 = 1480
Step 297: 1480 + 5 = 1485
Step 298: 1485 + 5 = 1490
Step 299: 1490 + 5 = 1495
Step 300: 1495 + 5 = 1500
Step 301: 1500 + 5 = 1505
Step 302: 1505 + 5 = 1510
Step 303: 1510 + 5 = 1515
Step 304: 1515 + 5 = 1520
Step 305: 1520 + 5 = 1525
Step 306: 1525 + 5 = 1530
Step 307: 1530 + 5 = 1535
Step 308: 1535 + 5 = 1540
Step 309: 1540 + 5 = 1545
Step 310: 1545 + 5 = 1550
Step 311: 1550 + 5 = 1555
Step 312: 1555 + 5 = 1560
Step 313: 1560 + 5 = 1565
Step 314: 1565 + 5 = 1570
Step 315: 1570 + 5 = 1575
Step 316: 1575 + 5 = 1580
Step 317: 1580 + 5 = 1585
Step 318: 1585 + 5 = 1590
Step 319: 1590 + 5 = 1595
Step 320: 1595 + 5 = 1600
Step 321: 1600 + 5 = 1605
Step 322: 1605 + 5 = 1610
Step 323: 1610 + 5 = 1615
Step 324: 1615 + 5 = 1620
Step 325: 1620 + 5 = 1625
Step 326: 1625 + 5 = 1630
Step 327: 1630 + 5 = 1635
Step 328: 1635 + 5 = 1640
Step 329: 1640 + 5 = 1645
Step 330: 1645 + 5 = 1650
Step 331: 1650 + 5 = 1655
Step 332: 1655 + 5 = 1660
Step 333: 1660 + 5 = 1665
Step 334: 1665 + 5 = 1670
Step 335: 1670 + 5 = 1675
Step 336: 1675 + 5 = 1680
Step 337: 1680 + 5 = 1685
Step 338: 1685 + 5 = 1690
Step 339: 1690 + 5 = 1695
Step 340: 1695 + 5 = 1700
Step 341: 1700 + 5 = 1705
Step 342: 1705 + 5 = 1710
Step 343: 1710 + 5 = 1715
Step 344: 1715 + 5 = 1720
Step 345: 1720 + 5 = 1725
Step 346: 1725 + 5 = 1730
Step 347: 1730 + 5 = 1735
Step 348: 1735 + 5 = 1740
Step 349: 1740 + 5 = 1745
Step 350: 1745 + 5 = 1750
Step 351: 1750 + 5 = 1755
Step 352: 1755 + 5 = 1760
Step 353: 1760 + 5 = 1765
Step 354: 1765 + 5 = 1770
Step 355: 1770 + 5 = 1775
Step 356: 1775 + 5 = 1780
Step 357: 1780 + 5 = 1785
Step 358: 1785 + 5 = 1790
Step 359: 1790 + 5 = 1795
Step 360: 1795 + 5 = 1800
Step 361: 1800 + 5 = 1805
Step 362: 1805 + 5 = 1810
Step 363: 1810 + 5 = 1815
Step 364: 1815 + 5 = 1820
Step 365: 1820 + 5 = 1825
Step 366: 1825 + 5 = 1830
Step 367: 1830 + 5 = 1835
Step 368: 1835 + 5 = 1840
Step 369: 1840 + 5 = 1845
Step 370: 1845 + 5 = 1850
Step 371: 1850 + 5 = 1855
Step 372: 1855 + 5 = 1860
Step 373: 1860 + 5 = 1865
Step 374: 1865 + 5 = 1870
Step 375: 1870 + 5 = 1875
Step 376: 1875 + 5 = 1880
Step 377: 1880 + 5 = 1885
Step 378: 1885 + 5 = 1890
Step 379: 1890 + 5 = 1895
Step 380: 1895 + 5 = 1900
Step 381: 1900 + 5 = 1905
Step 382: 1905 + 5 = 1910
Step 383: 1910 + 5 = 1915
Step 384: 1915 + 5 = 1920
Step 385: 1920 + 5 = 1925
Step 386: 1925 + 5 = 1930
Step 387: 1930 + 5 = 1935
Step 388: 1935 + 5 = 1940
Step 389: 1940 + 5 = 1945
Step 390: 1945 + 5 = 1950
Step 391: 1950 + 5 = 1955
Step 392: 1955 + 5 = 1960
Step 393: 1960 + 5 = 1965
Step 394: 1965 + 5 = 1970
Step 395: 1970 + 5 = 1975
Step 396: 1975 + 5 = 1980
Step 397: 1980 + 5 = 1985
Step 398: 1985 + 5 = 1990
Step 399: 1990 + 5 = 1995
Step 400: 1995 + 5 = 2000
Step 401: 2000 + 5 = 2005
Step 402: 2005 + 5 = 2010
Step 403: 2010 + 5 = 2015
Step 404: 2015 + 5 = 2020
Step 405: 2020 + 5 = 2025
Step 406: 2025 + 5 = 2030
Step 407: 2030 + 5 = 2035
Step 408: 2035 + 5 = 2040
Step 409: 2040 + 5 = 2045
Step 410: 2045 + 5 = 2050
Step 411: 2050 + 5 = 2055
Step 412: 2055 + 5 = 2060
Step 413: 2060 + 5 = 2065
Step 414: 2065 + 5 = 2070
Step 415: 2070 + 5 = 2075
Step 416: 2075 + 5 = 2080
Step 417: 2080 + 5 = 2085
Step 418: 2085 + 5 = 2090
Step 419: 2090 + 5 = 2095
Step 420: 2095 + 5 = 2100
Step 421: 2100 + 5 = 2105
Step 422: 2105 + 5 = 2110
Step 423: 2110 + 5 = 2115
Step 424: 2115 + 5 = 2120
Step 425: 2120 + 5 = 2125
Step 426: 2125 + 5 = 2130
Step 427: 2130 + 5 = 2135
Step 428: 2135 + 5 = 2140
Step 429: 2140 + 5 = 2145
Step 430: 2145 + 5 = 2150
Step 431: 2150 + 5 = 2155
Step 432: 2155 + 5 = 2160
Step 433: 2160 + 5 = 2165
Step 434: 2165 + 5 = 2170
Step 435: 2170 + 5 = 2175
Step 436: 2175 + 5 = 2180
Step 437: 2180 + 5 = 2185
Step 438: 2185 + 5 = 2190
Step 439: 2190 + 5 = 2195
Step 440: 2195 + 5 = 2200
Step 441: 2200 + 5 = 2205
Step 442: 2205 + 5 = 2210
Step 443: 2210 + 5 = 2215
Step 444: 2215 + 5 = 2220
Step 445: 2220 + 5 = 2225
Step 446: 2225 + 5 = 2230
Step 447: 2230 + 5 = 2235
Step 448: 2235 + 5 = 2240
Step 449: 2240 + 5 = 2245
Step 450: 2245 + 5 = 2250
Step 451: 2250 + 5 = 2255
Step 452: 2255 + 5 = 2260
Step 453: 2260 + 5 = 2265
Step 454: 2265 + 5 = 2270
Step 455: 2270 + 5 = 2275
Step 456: 2275 + 5 = 2280
Step 457: 2280 + 5 = 2285
Step 458: 2285 + 5 = 2290
Step 459: 2290 + 5 = 2295
Step 460: 2295 + 5 = 2300
Step 461: 2300 + 5 = 2305
Step 462: 2305 + 5 = 2310
Step 463: 2310 + 5 = 2315
Step 464: 2315 + 5 = 2320
Step 465: 2320 + 5 = 2325
Step 466: 2325 + 5 = 2330
Step 467: 2330 + 5 = 2335
Step 468: 2335 + 5 = 2340
Step 469: 2340 + 5 = 2345
Step 470: 2345 + 5 = 2350
Step 471: 2350 + 5 = 2355
Step 472: 2355 + 5 = 2360
Step 473: 2360 + 5 = 2365
Step 474: 2365 + 5 = 2370
Step 475: 2370 + 5 = 2375
Step 476: 2375 + 5 = 2380
Step 477: 2380 + 5 = 2385
Step 478: 2385 + 5 = 2390
Step 479: 2390 + 5 = 2395
Step 480: 2395 + 5 = 2400
Step 481: 2400 + 5 = 2405
Step 482: 2405 + 5 = 2410
Step 483: 2410 + 5 = 2415
Step 484: 2415 + 5 = 2420
Step 485: 2420 + 5 = 2425
Step 486: 2425 + 5 = 2430
Step 487: 2430 + 5 = 2435
Step 488: 2435 + 5 = 2440
Step 489: 2440 + 5 = 2445
Step 490: 2445 + 5 = 2450
Step 491: 2450 + 5 = 2455

So, 5*491 = 2455