OK, let's work through this together. We're starting with 5 and we're going to multiply it by 248, which means we add 5 to itself 248 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

So, 5*248 = 1240