Alright, let's solve this math problem step by step. First, we have the number 20. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 427. So, we're going to take the number 20 and add it to itself 427 times.
Step 1: 0 + 20 = 20
Step 2: 20 + 20 = 40
Step 3: 40 + 20 = 60
Step 4: 60 + 20 = 80
Step 5: 80 + 20 = 100
Step 6: 100 + 20 = 120
Step 7: 120 + 20 = 140
Step 8: 140 + 20 = 160
Step 9: 160 + 20 = 180
Step 10: 180 + 20 = 200
Step 11: 200 + 20 = 220
Step 12: 220 + 20 = 240
Step 13: 240 + 20 = 260
Step 14: 260 + 20 = 280
Step 15: 280 + 20 = 300
Step 16: 300 + 20 = 320
Step 17: 320 + 20 = 340
Step 18: 340 + 20 = 360
Step 19: 360 + 20 = 380
Step 20: 380 + 20 = 400
Step 21: 400 + 20 = 420
Step 22: 420 + 20 = 440
Step 23: 440 + 20 = 460
Step 24: 460 + 20 = 480
Step 25: 480 + 20 = 500
Step 26: 500 + 20 = 520
Step 27: 520 + 20 = 540
Step 28: 540 + 20 = 560
Step 29: 560 + 20 = 580
Step 30: 580 + 20 = 600
Step 31: 600 + 20 = 620
Step 32: 620 + 20 = 640
Step 33: 640 + 20 = 660
Step 34: 660 + 20 = 680
Step 35: 680 + 20 = 700
Step 36: 700 + 20 = 720
Step 37: 720 + 20 = 740
Step 38: 740 + 20 = 760
Step 39: 760 + 20 = 780
Step 40: 780 + 20 = 800
Step 41: 800 + 20 = 820
Step 42: 820 + 20 = 840
Step 43: 840 + 20 = 860
Step 44: 860 + 20 = 880
Step 45: 880 + 20 = 900
Step 46: 900 + 20 = 920
Step 47: 920 + 20 = 940
Step 48: 940 + 20 = 960
Step 49: 960 + 20 = 980
Step 50: 980 + 20 = 1000
Step 51: 1000 + 20 = 1020
Step 52: 1020 + 20 = 1040
Step 53: 1040 + 20 = 1060
Step 54: 1060 + 20 = 1080
Step 55: 1080 + 20 = 1100
Step 56: 1100 + 20 = 1120
Step 57: 1120 + 20 = 1140
Step 58: 1140 + 20 = 1160
Step 59: 1160 + 20 = 1180
Step 60: 1180 + 20 = 1200
Step 61: 1200 + 20 = 1220
Step 62: 1220 + 20 = 1240
Step 63: 1240 + 20 = 1260
Step 64: 1260 + 20 = 1280
Step 65: 1280 + 20 = 1300
Step 66: 1300 + 20 = 1320
Step 67: 1320 + 20 = 1340
Step 68: 1340 + 20 = 1360
Step 69: 1360 + 20 = 1380
Step 70: 1380 + 20 = 1400
Step 71: 1400 + 20 = 1420
Step 72: 1420 + 20 = 1440
Step 73: 1440 + 20 = 1460
Step 74: 1460 + 20 = 1480
Step 75: 1480 + 20 = 1500
Step 76: 1500 + 20 = 1520
Step 77: 1520 + 20 = 1540
Step 78: 1540 + 20 = 1560
Step 79: 1560 + 20 = 1580
Step 80: 1580 + 20 = 1600
Step 81: 1600 + 20 = 1620
Step 82: 1620 + 20 = 1640
Step 83: 1640 + 20 = 1660
Step 84: 1660 + 20 = 1680
Step 85: 1680 + 20 = 1700
Step 86: 1700 + 20 = 1720
Step 87: 1720 + 20 = 1740
Step 88: 1740 + 20 = 1760
Step 89: 1760 + 20 = 1780
Step 90: 1780 + 20 = 1800
Step 91: 1800 + 20 = 1820
Step 92: 1820 + 20 = 1840
Step 93: 1840 + 20 = 1860
Step 94: 1860 + 20 = 1880
Step 95: 1880 + 20 = 1900
Step 96: 1900 + 20 = 1920
Step 97: 1920 + 20 = 1940
Step 98: 1940 + 20 = 1960
Step 99: 1960 + 20 = 1980
Step 100: 1980 + 20 = 2000
Step 101: 2000 + 20 = 2020
Step 102: 2020 + 20 = 2040
Step 103: 2040 + 20 = 2060
Step 104: 2060 + 20 = 2080
Step 105: 2080 + 20 = 2100
Step 106: 2100 + 20 = 2120
Step 107: 2120 + 20 = 2140
Step 108: 2140 + 20 = 2160
Step 109: 2160 + 20 = 2180
Step 110: 2180 + 20 = 2200
Step 111: 2200 + 20 = 2220
Step 112: 2220 + 20 = 2240
Step 113: 2240 + 20 = 2260
Step 114: 2260 + 20 = 2280
Step 115: 2280 + 20 = 2300
Step 116: 2300 + 20 = 2320
Step 117: 2320 + 20 = 2340
Step 118: 2340 + 20 = 2360
Step 119: 2360 + 20 = 2380
Step 120: 2380 + 20 = 2400
Step 121: 2400 + 20 = 2420
Step 122: 2420 + 20 = 2440
Step 123: 2440 + 20 = 2460
Step 124: 2460 + 20 = 2480
Step 125: 2480 + 20 = 2500
Step 126: 2500 + 20 = 2520
Step 127: 2520 + 20 = 2540
Step 128: 2540 + 20 = 2560
Step 129: 2560 + 20 = 2580
Step 130: 2580 + 20 = 2600
Step 131: 2600 + 20 = 2620
Step 132: 2620 + 20 = 2640
Step 133: 2640 + 20 = 2660
Step 134: 2660 + 20 = 2680
Step 135: 2680 + 20 = 2700
Step 136: 2700 + 20 = 2720
Step 137: 2720 + 20 = 2740
Step 138: 2740 + 20 = 2760
Step 139: 2760 + 20 = 2780
Step 140: 2780 + 20 = 2800
Step 141: 2800 + 20 = 2820
Step 142: 2820 + 20 = 2840
Step 143: 2840 + 20 = 2860
Step 144: 2860 + 20 = 2880
Step 145: 2880 + 20 = 2900
Step 146: 2900 + 20 = 2920
Step 147: 2920 + 20 = 2940
Step 148: 2940 + 20 = 2960
Step 149: 2960 + 20 = 2980
Step 150: 2980 + 20 = 3000
Step 151: 3000 + 20 = 3020
Step 152: 3020 + 20 = 3040
Step 153: 3040 + 20 = 3060
Step 154: 3060 + 20 = 3080
Step 155: 3080 + 20 = 3100
Step 156: 3100 + 20 = 3120
Step 157: 3120 + 20 = 3140
Step 158: 3140 + 20 = 3160
Step 159: 3160 + 20 = 3180
Step 160: 3180 + 20 = 3200
Step 161: 3200 + 20 = 3220
Step 162: 3220 + 20 = 3240
Step 163: 3240 + 20 = 3260
Step 164: 3260 + 20 = 3280
Step 165: 3280 + 20 = 3300
Step 166: 3300 + 20 = 3320
Step 167: 3320 + 20 = 3340
Step 168: 3340 + 20 = 3360
Step 169: 3360 + 20 = 3380
Step 170: 3380 + 20 = 3400
Step 171: 3400 + 20 = 3420
Step 172: 3420 + 20 = 3440
Step 173: 3440 + 20 = 3460
Step 174: 3460 + 20 = 3480
Step 175: 3480 + 20 = 3500
Step 176: 3500 + 20 = 3520
Step 177: 3520 + 20 = 3540
Step 178: 3540 + 20 = 3560
Step 179: 3560 + 20 = 3580
Step 180: 3580 + 20 = 3600
Step 181: 3600 + 20 = 3620
Step 182: 3620 + 20 = 3640
Step 183: 3640 + 20 = 3660
Step 184: 3660 + 20 = 3680
Step 185: 3680 + 20 = 3700
Step 186: 3700 + 20 = 3720
Step 187: 3720 + 20 = 3740
Step 188: 3740 + 20 = 3760
Step 189: 3760 + 20 = 3780
Step 190: 3780 + 20 = 3800
Step 191: 3800 + 20 = 3820
Step 192: 3820 + 20 = 3840
Step 193: 3840 + 20 = 3860
Step 194: 3860 + 20 = 3880
Step 195: 3880 + 20 = 3900
Step 196: 3900 + 20 = 3920
Step 197: 3920 + 20 = 3940
Step 198: 3940 + 20 = 3960
Step 199: 3960 + 20 = 3980
Step 200: 3980 + 20 = 4000
Step 201: 4000 + 20 = 4020
Step 202: 4020 + 20 = 4040
Step 203: 4040 + 20 = 4060
Step 204: 4060 + 20 = 4080
Step 205: 4080 + 20 = 4100
Step 206: 4100 + 20 = 4120
Step 207: 4120 + 20 = 4140
Step 208: 4140 + 20 = 4160
Step 209: 4160 + 20 = 4180
Step 210: 4180 + 20 = 4200
Step 211: 4200 + 20 = 4220
Step 212: 4220 + 20 = 4240
Step 213: 4240 + 20 = 4260
Step 214: 4260 + 20 = 4280
Step 215: 4280 + 20 = 4300
Step 216: 4300 + 20 = 4320
Step 217: 4320 + 20 = 4340
Step 218: 4340 + 20 = 4360
Step 219: 4360 + 20 = 4380
Step 220: 4380 + 20 = 4400
Step 221: 4400 + 20 = 4420
Step 222: 4420 + 20 = 4440
Step 223: 4440 + 20 = 4460
Step 224: 4460 + 20 = 4480
Step 225: 4480 + 20 = 4500
Step 226: 4500 + 20 = 4520
Step 227: 4520 + 20 = 4540
Step 228: 4540 + 20 = 4560
Step 229: 4560 + 20 = 4580
Step 230: 4580 + 20 = 4600
Step 231: 4600 + 20 = 4620
Step 232: 4620 + 20 = 4640
Step 233: 4640 + 20 = 4660
Step 234: 4660 + 20 = 4680
Step 235: 4680 + 20 = 4700
Step 236: 4700 + 20 = 4720
Step 237: 4720 + 20 = 4740
Step 238: 4740 + 20 = 4760
Step 239: 4760 + 20 = 4780
Step 240: 4780 + 20 = 4800
Step 241: 4800 + 20 = 4820
Step 242: 4820 + 20 = 4840
Step 243: 4840 + 20 = 4860
Step 244: 4860 + 20 = 4880
Step 245: 4880 + 20 = 4900
Step 246: 4900 + 20 = 4920
Step 247: 4920 + 20 = 4940
Step 248: 4940 + 20 = 4960
Step 249: 4960 + 20 = 4980
Step 250: 4980 + 20 = 5000
Step 251: 5000 + 20 = 5020
Step 252: 5020 + 20 = 5040
Step 253: 5040 + 20 = 5060
Step 254: 5060 + 20 = 5080
Step 255: 5080 + 20 = 5100
Step 256: 5100 + 20 = 5120
Step 257: 5120 + 20 = 5140
Step 258: 5140 + 20 = 5160
Step 259: 5160 + 20 = 5180
Step 260: 5180 + 20 = 5200
Step 261: 5200 + 20 = 5220
Step 262: 5220 + 20 = 5240
Step 263: 5240 + 20 = 5260
Step 264: 5260 + 20 = 5280
Step 265: 5280 + 20 = 5300
Step 266: 5300 + 20 = 5320
Step 267: 5320 + 20 = 5340
Step 268: 5340 + 20 = 5360
Step 269: 5360 + 20 = 5380
Step 270: 5380 + 20 = 5400
Step 271: 5400 + 20 = 5420
Step 272: 5420 + 20 = 5440
Step 273: 5440 + 20 = 5460
Step 274: 5460 + 20 = 5480
Step 275: 5480 + 20 = 5500
Step 276: 5500 + 20 = 5520
Step 277: 5520 + 20 = 5540
Step 278: 5540 + 20 = 5560
Step 279: 5560 + 20 = 5580
Step 280: 5580 + 20 = 5600
Step 281: 5600 + 20 = 5620
Step 282: 5620 + 20 = 5640
Step 283: 5640 + 20 = 5660
Step 284: 5660 + 20 = 5680
Step 285: 5680 + 20 = 5700
Step 286: 5700 + 20 = 5720
Step 287: 5720 + 20 = 5740
Step 288: 5740 + 20 = 5760
Step 289: 5760 + 20 = 5780
Step 290: 5780 + 20 = 5800
Step 291: 5800 + 20 = 5820
Step 292: 5820 + 20 = 5840
Step 293: 5840 + 20 = 5860
Step 294: 5860 + 20 = 5880
Step 295: 5880 + 20 = 5900
Step 296: 5900 + 20 = 5920
Step 297: 5920 + 20 = 5940
Step 298: 5940 + 20 = 5960
Step 299: 5960 + 20 = 5980
Step 300: 5980 + 20 = 6000
Step 301: 6000 + 20 = 6020
Step 302: 6020 + 20 = 6040
Step 303: 6040 + 20 = 6060
Step 304: 6060 + 20 = 6080
Step 305: 6080 + 20 = 6100
Step 306: 6100 + 20 = 6120
Step 307: 6120 + 20 = 6140
Step 308: 6140 + 20 = 6160
Step 309: 6160 + 20 = 6180
Step 310: 6180 + 20 = 6200
Step 311: 6200 + 20 = 6220
Step 312: 6220 + 20 = 6240
Step 313: 6240 + 20 = 6260
Step 314: 6260 + 20 = 6280
Step 315: 6280 + 20 = 6300
Step 316: 6300 + 20 = 6320
Step 317: 6320 + 20 = 6340
Step 318: 6340 + 20 = 6360
Step 319: 6360 + 20 = 6380
Step 320: 6380 + 20 = 6400
Step 321: 6400 + 20 = 6420
Step 322: 6420 + 20 = 6440
Step 323: 6440 + 20 = 6460
Step 324: 6460 + 20 = 6480
Step 325: 6480 + 20 = 6500
Step 326: 6500 + 20 = 6520
Step 327: 6520 + 20 = 6540
Step 328: 6540 + 20 = 6560
Step 329: 6560 + 20 = 6580
Step 330: 6580 + 20 = 6600
Step 331: 6600 + 20 = 6620
Step 332: 6620 + 20 = 6640
Step 333: 6640 + 20 = 6660
Step 334: 6660 + 20 = 6680
Step 335: 6680 + 20 = 6700
Step 336: 6700 + 20 = 6720
Step 337: 6720 + 20 = 6740
Step 338: 6740 + 20 = 6760
Step 339: 6760 + 20 = 6780
Step 340: 6780 + 20 = 6800
Step 341: 6800 + 20 = 6820
Step 342: 6820 + 20 = 6840
Step 343: 6840 + 20 = 6860
Step 344: 6860 + 20 = 6880
Step 345: 6880 + 20 = 6900
Step 346: 6900 + 20 = 6920
Step 347: 6920 + 20 = 6940
Step 348: 6940 + 20 = 6960
Step 349: 6960 + 20 = 6980
Step 350: 6980 + 20 = 7000
Step 351: 7000 + 20 = 7020
Step 352: 7020 + 20 = 7040
Step 353: 7040 + 20 = 7060
Step 354: 7060 + 20 = 7080
Step 355: 7080 + 20 = 7100
Step 356: 7100 + 20 = 7120
Step 357: 7120 + 20 = 7140
Step 358: 7140 + 20 = 7160
Step 359: 7160 + 20 = 7180
Step 360: 7180 + 20 = 7200
Step 361: 7200 + 20 = 7220
Step 362: 7220 + 20 = 7240
Step 363: 7240 + 20 = 7260
Step 364: 7260 + 20 = 7280
Step 365: 7280 + 20 = 7300
Step 366: 7300 + 20 = 7320
Step 367: 7320 + 20 = 7340
Step 368: 7340 + 20 = 7360
Step 369: 7360 + 20 = 7380
Step 370: 7380 + 20 = 7400
Step 371: 7400 + 20 = 7420
Step 372: 7420 + 20 = 7440
Step 373: 7440 + 20 = 7460
Step 374: 7460 + 20 = 7480
Step 375: 7480 + 20 = 7500
Step 376: 7500 + 20 = 7520
Step 377: 7520 + 20 = 7540
Step 378: 7540 + 20 = 7560
Step 379: 7560 + 20 = 7580
Step 380: 7580 + 20 = 7600
Step 381: 7600 + 20 = 7620
Step 382: 7620 + 20 = 7640
Step 383: 7640 + 20 = 7660
Step 384: 7660 + 20 = 7680
Step 385: 7680 + 20 = 7700
Step 386: 7700 + 20 = 7720
Step 387: 7720 + 20 = 7740
Step 388: 7740 + 20 = 7760
Step 389: 7760 + 20 = 7780
Step 390: 7780 + 20 = 7800
Step 391: 7800 + 20 = 7820
Step 392: 7820 + 20 = 7840
Step 393: 7840 + 20 = 7860
Step 394: 7860 + 20 = 7880
Step 395: 7880 + 20 = 7900
Step 396: 7900 + 20 = 7920
Step 397: 7920 + 20 = 7940
Step 398: 7940 + 20 = 7960
Step 399: 7960 + 20 = 7980
Step 400: 7980 + 20 = 8000
Step 401: 8000 + 20 = 8020
Step 402: 8020 + 20 = 8040
Step 403: 8040 + 20 = 8060
Step 404: 8060 + 20 = 8080
Step 405: 8080 + 20 = 8100
Step 406: 8100 + 20 = 8120
Step 407: 8120 + 20 = 8140
Step 408: 8140 + 20 = 8160
Step 409: 8160 + 20 = 8180
Step 410: 8180 + 20 = 8200
Step 411: 8200 + 20 = 8220
Step 412: 8220 + 20 = 8240
Step 413: 8240 + 20 = 8260
Step 414: 8260 + 20 = 8280
Step 415: 8280 + 20 = 8300
Step 416: 8300 + 20 = 8320
Step 417: 8320 + 20 = 8340
Step 418: 8340 + 20 = 8360
Step 419: 8360 + 20 = 8380
Step 420: 8380 + 20 = 8400
Step 421: 8400 + 20 = 8420
Step 422: 8420 + 20 = 8440
Step 423: 8440 + 20 = 8460
Step 424: 8460 + 20 = 8480
Step 425: 8480 + 20 = 8500
Step 426: 8500 + 20 = 8520
Step 427: 8520 + 20 = 8540

So, 20*427 = 8540