OK, let's work through this together. We're starting with 10 and we're going to multiply it by 280, which means we add 10 to itself 280 times.
Step 1: 0 + 10 = 10
Step 2: 10 + 10 = 20
Step 3: 20 + 10 = 30
Step 4: 30 + 10 = 40
Step 5: 40 + 10 = 50
Step 6: 50 + 10 = 60
Step 7: 60 + 10 = 70
Step 8: 70 + 10 = 80
Step 9: 80 + 10 = 90
Step 10: 90 + 10 = 100
Step 11: 100 + 10 = 110
Step 12: 110 + 10 = 120
Step 13: 120 + 10 = 130
Step 14: 130 + 10 = 140
Step 15: 140 + 10 = 150
Step 16: 150 + 10 = 160
Step 17: 160 + 10 = 170
Step 18: 170 + 10 = 180
Step 19: 180 + 10 = 190
Step 20: 190 + 10 = 200
Step 21: 200 + 10 = 210
Step 22: 210 + 10 = 220
Step 23: 220 + 10 = 230
Step 24: 230 + 10 = 240
Step 25: 240 + 10 = 250
Step 26: 250 + 10 = 260
Step 27: 260 + 10 = 270
Step 28: 270 + 10 = 280
Step 29: 280 + 10 = 290
Step 30: 290 + 10 = 300
Step 31: 300 + 10 = 310
Step 32: 310 + 10 = 320
Step 33: 320 + 10 = 330
Step 34: 330 + 10 = 340
Step 35: 340 + 10 = 350
Step 36: 350 + 10 = 360
Step 37: 360 + 10 = 370
Step 38: 370 + 10 = 380
Step 39: 380 + 10 = 390
Step 40: 390 + 10 = 400
Step 41: 400 + 10 = 410
Step 42: 410 + 10 = 420
Step 43: 420 + 10 = 430
Step 44: 430 + 10 = 440
Step 45: 440 + 10 = 450
Step 46: 450 + 10 = 460
Step 47: 460 + 10 = 470
Step 48: 470 + 10 = 480
Step 49: 480 + 10 = 490
Step 50: 490 + 10 = 500
Step 51: 500 + 10 = 510
Step 52: 510 + 10 = 520
Step 53: 520 + 10 = 530
Step 54: 530 + 10 = 540
Step 55: 540 + 10 = 550
Step 56: 550 + 10 = 560
Step 57: 560 + 10 = 570
Step 58: 570 + 10 = 580
Step 59: 580 + 10 = 590
Step 60: 590 + 10 = 600
Step 61: 600 + 10 = 610
Step 62: 610 + 10 = 620
Step 63: 620 + 10 = 630
Step 64: 630 + 10 = 640
Step 65: 640 + 10 = 650
Step 66: 650 + 10 = 660
Step 67: 660 + 10 = 670
Step 68: 670 + 10 = 680
Step 69: 680 + 10 = 690
Step 70: 690 + 10 = 700
Step 71: 700 + 10 = 710
Step 72: 710 + 10 = 720
Step 73: 720 + 10 = 730
Step 74: 730 + 10 = 740
Step 75: 740 + 10 = 750
Step 76: 750 + 10 = 760
Step 77: 760 + 10 = 770
Step 78: 770 + 10 = 780
Step 79: 780 + 10 = 790
Step 80: 790 + 10 = 800
Step 81: 800 + 10 = 810
Step 82: 810 + 10 = 820
Step 83: 820 + 10 = 830
Step 84: 830 + 10 = 840
Step 85: 840 + 10 = 850
Step 86: 850 + 10 = 860
Step 87: 860 + 10 = 870
Step 88: 870 + 10 = 880
Step 89: 880 + 10 = 890
Step 90: 890 + 10 = 900
Step 91: 900 + 10 = 910
Step 92: 910 + 10 = 920
Step 93: 920 + 10 = 930
Step 94: 930 + 10 = 940
Step 95: 940 + 10 = 950
Step 96: 950 + 10 = 960
Step 97: 960 + 10 = 970
Step 98: 970 + 10 = 980
Step 99: 980 + 10 = 990
Step 100: 990 + 10 = 1000
Step 101: 1000 + 10 = 1010
Step 102: 1010 + 10 = 1020
Step 103: 1020 + 10 = 1030
Step 104: 1030 + 10 = 1040
Step 105: 1040 + 10 = 1050
Step 106: 1050 + 10 = 1060
Step 107: 1060 + 10 = 1070
Step 108: 1070 + 10 = 1080
Step 109: 1080 + 10 = 1090
Step 110: 1090 + 10 = 1100
Step 111: 1100 + 10 = 1110
Step 112: 1110 + 10 = 1120
Step 113: 1120 + 10 = 1130
Step 114: 1130 + 10 = 1140
Step 115: 1140 + 10 = 1150
Step 116: 1150 + 10 = 1160
Step 117: 1160 + 10 = 1170
Step 118: 1170 + 10 = 1180
Step 119: 1180 + 10 = 1190
Step 120: 1190 + 10 = 1200
Step 121: 1200 + 10 = 1210
Step 122: 1210 + 10 = 1220
Step 123: 1220 + 10 = 1230
Step 124: 1230 + 10 = 1240
Step 125: 1240 + 10 = 1250
Step 126: 1250 + 10 = 1260
Step 127: 1260 + 10 = 1270
Step 128: 1270 + 10 = 1280
Step 129: 1280 + 10 = 1290
Step 130: 1290 + 10 = 1300
Step 131: 1300 + 10 = 1310
Step 132: 1310 + 10 = 1320
Step 133: 1320 + 10 = 1330
Step 134: 1330 + 10 = 1340
Step 135: 1340 + 10 = 1350
Step 136: 1350 + 10 = 1360
Step 137: 1360 + 10 = 1370
Step 138: 1370 + 10 = 1380
Step 139: 1380 + 10 = 1390
Step 140: 1390 + 10 = 1400
Step 141: 1400 + 10 = 1410
Step 142: 1410 + 10 = 1420
Step 143: 1420 + 10 = 1430
Step 144: 1430 + 10 = 1440
Step 145: 1440 + 10 = 1450
Step 146: 1450 + 10 = 1460
Step 147: 1460 + 10 = 1470
Step 148: 1470 + 10 = 1480
Step 149: 1480 + 10 = 1490
Step 150: 1490 + 10 = 1500
Step 151: 1500 + 10 = 1510
Step 152: 1510 + 10 = 1520
Step 153: 1520 + 10 = 1530
Step 154: 1530 + 10 = 1540
Step 155: 1540 + 10 = 1550
Step 156: 1550 + 10 = 1560
Step 157: 1560 + 10 = 1570
Step 158: 1570 + 10 = 1580
Step 159: 1580 + 10 = 1590
Step 160: 1590 + 10 = 1600
Step 161: 1600 + 10 = 1610
Step 162: 1610 + 10 = 1620
Step 163: 1620 + 10 = 1630
Step 164: 1630 + 10 = 1640
Step 165: 1640 + 10 = 1650
Step 166: 1650 + 10 = 1660
Step 167: 1660 + 10 = 1670
Step 168: 1670 + 10 = 1680
Step 169: 1680 + 10 = 1690
Step 170: 1690 + 10 = 1700
Step 171: 1700 + 10 = 1710
Step 172: 1710 + 10 = 1720
Step 173: 1720 + 10 = 1730
Step 174: 1730 + 10 = 1740
Step 175: 1740 + 10 = 1750
Step 176: 1750 + 10 = 1760
Step 177: 1760 + 10 = 1770
Step 178: 1770 + 10 = 1780
Step 179: 1780 + 10 = 1790
Step 180: 1790 + 10 = 1800
Step 181: 1800 + 10 = 1810
Step 182: 1810 + 10 = 1820
Step 183: 1820 + 10 = 1830
Step 184: 1830 + 10 = 1840
Step 185: 1840 + 10 = 1850
Step 186: 1850 + 10 = 1860
Step 187: 1860 + 10 = 1870
Step 188: 1870 + 10 = 1880
Step 189: 1880 + 10 = 1890
Step 190: 1890 + 10 = 1900
Step 191: 1900 + 10 = 1910
Step 192: 1910 + 10 = 1920
Step 193: 1920 + 10 = 1930
Step 194: 1930 + 10 = 1940
Step 195: 1940 + 10 = 1950
Step 196: 1950 + 10 = 1960
Step 197: 1960 + 10 = 1970
Step 198: 1970 + 10 = 1980
Step 199: 1980 + 10 = 1990
Step 200: 1990 + 10 = 2000
Step 201: 2000 + 10 = 2010
Step 202: 2010 + 10 = 2020
Step 203: 2020 + 10 = 2030
Step 204: 2030 + 10 = 2040
Step 205: 2040 + 10 = 2050
Step 206: 2050 + 10 = 2060
Step 207: 2060 + 10 = 2070
Step 208: 2070 + 10 = 2080
Step 209: 2080 + 10 = 2090
Step 210: 2090 + 10 = 2100
Step 211: 2100 + 10 = 2110
Step 212: 2110 + 10 = 2120
Step 213: 2120 + 10 = 2130
Step 214: 2130 + 10 = 2140
Step 215: 2140 + 10 = 2150
Step 216: 2150 + 10 = 2160
Step 217: 2160 + 10 = 2170
Step 218: 2170 + 10 = 2180
Step 219: 2180 + 10 = 2190
Step 220: 2190 + 10 = 2200
Step 221: 2200 + 10 = 2210
Step 222: 2210 + 10 = 2220
Step 223: 2220 + 10 = 2230
Step 224: 2230 + 10 = 2240
Step 225: 2240 + 10 = 2250
Step 226: 2250 + 10 = 2260
Step 227: 2260 + 10 = 2270
Step 228: 2270 + 10 = 2280
Step 229: 2280 + 10 = 2290
Step 230: 2290 + 10 = 2300
Step 231: 2300 + 10 = 2310
Step 232: 2310 + 10 = 2320
Step 233: 2320 + 10 = 2330
Step 234: 2330 + 10 = 2340
Step 235: 2340 + 10 = 2350
Step 236: 2350 + 10 = 2360
Step 237: 2360 + 10 = 2370
Step 238: 2370 + 10 = 2380
Step 239: 2380 + 10 = 2390
Step 240: 2390 + 10 = 2400
Step 241: 2400 + 10 = 2410
Step 242: 2410 + 10 = 2420
Step 243: 2420 + 10 = 2430
Step 244: 2430 + 10 = 2440
Step 245: 2440 + 10 = 2450
Step 246: 2450 + 10 = 2460
Step 247: 2460 + 10 = 2470
Step 248: 2470 + 10 = 2480
Step 249: 2480 + 10 = 2490
Step 250: 2490 + 10 = 2500
Step 251: 2500 + 10 = 2510
Step 252: 2510 + 10 = 2520
Step 253: 2520 + 10 = 2530
Step 254: 2530 + 10 = 2540
Step 255: 2540 + 10 = 2550
Step 256: 2550 + 10 = 2560
Step 257: 2560 + 10 = 2570
Step 258: 2570 + 10 = 2580
Step 259: 2580 + 10 = 2590
Step 260: 2590 + 10 = 2600
Step 261: 2600 + 10 = 2610
Step 262: 2610 + 10 = 2620
Step 263: 2620 + 10 = 2630
Step 264: 2630 + 10 = 2640
Step 265: 2640 + 10 = 2650
Step 266: 2650 + 10 = 2660
Step 267: 2660 + 10 = 2670
Step 268: 2670 + 10 = 2680
Step 269: 2680 + 10 = 2690
Step 270: 2690 + 10 = 2700
Step 271: 2700 + 10 = 2710
Step 272: 2710 + 10 = 2720
Step 273: 2720 + 10 = 2730
Step 274: 2730 + 10 = 2740
Step 275: 2740 + 10 = 2750
Step 276: 2750 + 10 = 2760
Step 277: 2760 + 10 = 2770
Step 278: 2770 + 10 = 2780
Step 279: 2780 + 10 = 2790
Step 280: 2790 + 10 = 2800

So, 10*280 = 2800