OK, let's work through this together. We're starting with 88 and we're going to multiply it by 450, which means we add 88 to itself 450 times.
Step 1: 0 + 88 = 88
Step 2: 88 + 88 = 176
Step 3: 176 + 88 = 264
Step 4: 264 + 88 = 352
Step 5: 352 + 88 = 440
Step 6: 440 + 88 = 528
Step 7: 528 + 88 = 616
Step 8: 616 + 88 = 704
Step 9: 704 + 88 = 792
Step 10: 792 + 88 = 880
Step 11: 880 + 88 = 968
Step 12: 968 + 88 = 1056
Step 13: 1056 + 88 = 1144
Step 14: 1144 + 88 = 1232
Step 15: 1232 + 88 = 1320
Step 16: 1320 + 88 = 1408
Step 17: 1408 + 88 = 1496
Step 18: 1496 + 88 = 1584
Step 19: 1584 + 88 = 1672
Step 20: 1672 + 88 = 1760
Step 21: 1760 + 88 = 1848
Step 22: 1848 + 88 = 1936
Step 23: 1936 + 88 = 2024
Step 24: 2024 + 88 = 2112
Step 25: 2112 + 88 = 2200
Step 26: 2200 + 88 = 2288
Step 27: 2288 + 88 = 2376
Step 28: 2376 + 88 = 2464
Step 29: 2464 + 88 = 2552
Step 30: 2552 + 88 = 2640
Step 31: 2640 + 88 = 2728
Step 32: 2728 + 88 = 2816
Step 33: 2816 + 88 = 2904
Step 34: 2904 + 88 = 2992
Step 35: 2992 + 88 = 3080
Step 36: 3080 + 88 = 3168
Step 37: 3168 + 88 = 3256
Step 38: 3256 + 88 = 3344
Step 39: 3344 + 88 = 3432
Step 40: 3432 + 88 = 3520
Step 41: 3520 + 88 = 3608
Step 42: 3608 + 88 = 3696
Step 43: 3696 + 88 = 3784
Step 44: 3784 + 88 = 3872
Step 45: 3872 + 88 = 3960
Step 46: 3960 + 88 = 4048
Step 47: 4048 + 88 = 4136
Step 48: 4136 + 88 = 4224
Step 49: 4224 + 88 = 4312
Step 50: 4312 + 88 = 4400
Step 51: 4400 + 88 = 4488
Step 52: 4488 + 88 = 4576
Step 53: 4576 + 88 = 4664
Step 54: 4664 + 88 = 4752
Step 55: 4752 + 88 = 4840
Step 56: 4840 + 88 = 4928
Step 57: 4928 + 88 = 5016
Step 58: 5016 + 88 = 5104
Step 59: 5104 + 88 = 5192
Step 60: 5192 + 88 = 5280
Step 61: 5280 + 88 = 5368
Step 62: 5368 + 88 = 5456
Step 63: 5456 + 88 = 5544
Step 64: 5544 + 88 = 5632
Step 65: 5632 + 88 = 5720
Step 66: 5720 + 88 = 5808
Step 67: 5808 + 88 = 5896
Step 68: 5896 + 88 = 5984
Step 69: 5984 + 88 = 6072
Step 70: 6072 + 88 = 6160
Step 71: 6160 + 88 = 6248
Step 72: 6248 + 88 = 6336
Step 73: 6336 + 88 = 6424
Step 74: 6424 + 88 = 6512
Step 75: 6512 + 88 = 6600
Step 76: 6600 + 88 = 6688
Step 77: 6688 + 88 = 6776
Step 78: 6776 + 88 = 6864
Step 79: 6864 + 88 = 6952
Step 80: 6952 + 88 = 7040
Step 81: 7040 + 88 = 7128
Step 82: 7128 + 88 = 7216
Step 83: 7216 + 88 = 7304
Step 84: 7304 + 88 = 7392
Step 85: 7392 + 88 = 7480
Step 86: 7480 + 88 = 7568
Step 87: 7568 + 88 = 7656
Step 88: 7656 + 88 = 7744
Step 89: 7744 + 88 = 7832
Step 90: 7832 + 88 = 7920
Step 91: 7920 + 88 = 8008
Step 92: 8008 + 88 = 8096
Step 93: 8096 + 88 = 8184
Step 94: 8184 + 88 = 8272
Step 95: 8272 + 88 = 8360
Step 96: 8360 + 88 = 8448
Step 97: 8448 + 88 = 8536
Step 98: 8536 + 88 = 8624
Step 99: 8624 + 88 = 8712
Step 100: 8712 + 88 = 8800
Step 101: 8800 + 88 = 8888
Step 102: 8888 + 88 = 8976
Step 103: 8976 + 88 = 9064
Step 104: 9064 + 88 = 9152
Step 105: 9152 + 88 = 9240
Step 106: 9240 + 88 = 9328
Step 107: 9328 + 88 = 9416
Step 108: 9416 + 88 = 9504
Step 109: 9504 + 88 = 9592
Step 110: 9592 + 88 = 9680
Step 111: 9680 + 88 = 9768
Step 112: 9768 + 88 = 9856
Step 113: 9856 + 88 = 9944
Step 114: 9944 + 88 = 10032
Step 115: 10032 + 88 = 10120
Step 116: 10120 + 88 = 10208
Step 117: 10208 + 88 = 10296
Step 118: 10296 + 88 = 10384
Step 119: 10384 + 88 = 10472
Step 120: 10472 + 88 = 10560
Step 121: 10560 + 88 = 10648
Step 122: 10648 + 88 = 10736
Step 123: 10736 + 88 = 10824
Step 124: 10824 + 88 = 10912
Step 125: 10912 + 88 = 11000
Step 126: 11000 + 88 = 11088
Step 127: 11088 + 88 = 11176
Step 128: 11176 + 88 = 11264
Step 129: 11264 + 88 = 11352
Step 130: 11352 + 88 = 11440
Step 131: 11440 + 88 = 11528
Step 132: 11528 + 88 = 11616
Step 133: 11616 + 88 = 11704
Step 134: 11704 + 88 = 11792
Step 135: 11792 + 88 = 11880
Step 136: 11880 + 88 = 11968
Step 137: 11968 + 88 = 12056
Step 138: 12056 + 88 = 12144
Step 139: 12144 + 88 = 12232
Step 140: 12232 + 88 = 12320
Step 141: 12320 + 88 = 12408
Step 142: 12408 + 88 = 12496
Step 143: 12496 + 88 = 12584
Step 144: 12584 + 88 = 12672
Step 145: 12672 + 88 = 12760
Step 146: 12760 + 88 = 12848
Step 147: 12848 + 88 = 12936
Step 148: 12936 + 88 = 13024
Step 149: 13024 + 88 = 13112
Step 150: 13112 + 88 = 13200
Step 151: 13200 + 88 = 13288
Step 152: 13288 + 88 = 13376
Step 153: 13376 + 88 = 13464
Step 154: 13464 + 88 = 13552
Step 155: 13552 + 88 = 13640
Step 156: 13640 + 88 = 13728
Step 157: 13728 + 88 = 13816
Step 158: 13816 + 88 = 13904
Step 159: 13904 + 88 = 13992
Step 160: 13992 + 88 = 14080
Step 161: 14080 + 88 = 14168
Step 162: 14168 + 88 = 14256
Step 163: 14256 + 88 = 14344
Step 164: 14344 + 88 = 14432
Step 165: 14432 + 88 = 14520
Step 166: 14520 + 88 = 14608
Step 167: 14608 + 88 = 14696
Step 168: 14696 + 88 = 14784
Step 169: 14784 + 88 = 14872
Step 170: 14872 + 88 = 14960
Step 171: 14960 + 88 = 15048
Step 172: 15048 + 88 = 15136
Step 173: 15136 + 88 = 15224
Step 174: 15224 + 88 = 15312
Step 175: 15312 + 88 = 15400
Step 176: 15400 + 88 = 15488
Step 177: 15488 + 88 = 15576
Step 178: 15576 + 88 = 15664
Step 179: 15664 + 88 = 15752
Step 180: 15752 + 88 = 15840
Step 181: 15840 + 88 = 15928
Step 182: 15928 + 88 = 16016
Step 183: 16016 + 88 = 16104
Step 184: 16104 + 88 = 16192
Step 185: 16192 + 88 = 16280
Step 186: 16280 + 88 = 16368
Step 187: 16368 + 88 = 16456
Step 188: 16456 + 88 = 16544
Step 189: 16544 + 88 = 16632
Step 190: 16632 + 88 = 16720
Step 191: 16720 + 88 = 16808
Step 192: 16808 + 88 = 16896
Step 193: 16896 + 88 = 16984
Step 194: 16984 + 88 = 17072
Step 195: 17072 + 88 = 17160
Step 196: 17160 + 88 = 17248
Step 197: 17248 + 88 = 17336
Step 198: 17336 + 88 = 17424
Step 199: 17424 + 88 = 17512
Step 200: 17512 + 88 = 17600
Step 201: 17600 + 88 = 17688
Step 202: 17688 + 88 = 17776
Step 203: 17776 + 88 = 17864
Step 204: 17864 + 88 = 17952
Step 205: 17952 + 88 = 18040
Step 206: 18040 + 88 = 18128
Step 207: 18128 + 88 = 18216
Step 208: 18216 + 88 = 18304
Step 209: 18304 + 88 = 18392
Step 210: 18392 + 88 = 18480
Step 211: 18480 + 88 = 18568
Step 212: 18568 + 88 = 18656
Step 213: 18656 + 88 = 18744
Step 214: 18744 + 88 = 18832
Step 215: 18832 + 88 = 18920
Step 216: 18920 + 88 = 19008
Step 217: 19008 + 88 = 19096
Step 218: 19096 + 88 = 19184
Step 219: 19184 + 88 = 19272
Step 220: 19272 + 88 = 19360
Step 221: 19360 + 88 = 19448
Step 222: 19448 + 88 = 19536
Step 223: 19536 + 88 = 19624
Step 224: 19624 + 88 = 19712
Step 225: 19712 + 88 = 19800
Step 226: 19800 + 88 = 19888
Step 227: 19888 + 88 = 19976
Step 228: 19976 + 88 = 20064
Step 229: 20064 + 88 = 20152
Step 230: 20152 + 88 = 20240
Step 231: 20240 + 88 = 20328
Step 232: 20328 + 88 = 20416
Step 233: 20416 + 88 = 20504
Step 234: 20504 + 88 = 20592
Step 235: 20592 + 88 = 20680
Step 236: 20680 + 88 = 20768
Step 237: 20768 + 88 = 20856
Step 238: 20856 + 88 = 20944
Step 239: 20944 + 88 = 21032
Step 240: 21032 + 88 = 21120
Step 241: 21120 + 88 = 21208
Step 242: 21208 + 88 = 21296
Step 243: 21296 + 88 = 21384
Step 244: 21384 + 88 = 21472
Step 245: 21472 + 88 = 21560
Step 246: 21560 + 88 = 21648
Step 247: 21648 + 88 = 21736
Step 248: 21736 + 88 = 21824
Step 249: 21824 + 88 = 21912
Step 250: 21912 + 88 = 22000
Step 251: 22000 + 88 = 22088
Step 252: 22088 + 88 = 22176
Step 253: 22176 + 88 = 22264
Step 254: 22264 + 88 = 22352
Step 255: 22352 + 88 = 22440
Step 256: 22440 + 88 = 22528
Step 257: 22528 + 88 = 22616
Step 258: 22616 + 88 = 22704
Step 259: 22704 + 88 = 22792
Step 260: 22792 + 88 = 22880
Step 261: 22880 + 88 = 22968
Step 262: 22968 + 88 = 23056
Step 263: 23056 + 88 = 23144
Step 264: 23144 + 88 = 23232
Step 265: 23232 + 88 = 23320
Step 266: 23320 + 88 = 23408
Step 267: 23408 + 88 = 23496
Step 268: 23496 + 88 = 23584
Step 269: 23584 + 88 = 23672
Step 270: 23672 + 88 = 23760
Step 271: 23760 + 88 = 23848
Step 272: 23848 + 88 = 23936
Step 273: 23936 + 88 = 24024
Step 274: 24024 + 88 = 24112
Step 275: 24112 + 88 = 24200
Step 276: 24200 + 88 = 24288
Step 277: 24288 + 88 = 24376
Step 278: 24376 + 88 = 24464
Step 279: 24464 + 88 = 24552
Step 280: 24552 + 88 = 24640
Step 281: 24640 + 88 = 24728
Step 282: 24728 + 88 = 24816
Step 283: 24816 + 88 = 24904
Step 284: 24904 + 88 = 24992
Step 285: 24992 + 88 = 25080
Step 286: 25080 + 88 = 25168
Step 287: 25168 + 88 = 25256
Step 288: 25256 + 88 = 25344
Step 289: 25344 + 88 = 25432
Step 290: 25432 + 88 = 25520
Step 291: 25520 + 88 = 25608
Step 292: 25608 + 88 = 25696
Step 293: 25696 + 88 = 25784
Step 294: 25784 + 88 = 25872
Step 295: 25872 + 88 = 25960
Step 296: 25960 + 88 = 26048
Step 297: 26048 + 88 = 26136
Step 298: 26136 + 88 = 26224
Step 299: 26224 + 88 = 26312
Step 300: 26312 + 88 = 26400
Step 301: 26400 + 88 = 26488
Step 302: 26488 + 88 = 26576
Step 303: 26576 + 88 = 26664
Step 304: 26664 + 88 = 26752
Step 305: 26752 + 88 = 26840
Step 306: 26840 + 88 = 26928
Step 307: 26928 + 88 = 27016
Step 308: 27016 + 88 = 27104
Step 309: 27104 + 88 = 27192
Step 310: 27192 + 88 = 27280
Step 311: 27280 + 88 = 27368
Step 312: 27368 + 88 = 27456
Step 313: 27456 + 88 = 27544
Step 314: 27544 + 88 = 27632
Step 315: 27632 + 88 = 27720
Step 316: 27720 + 88 = 27808
Step 317: 27808 + 88 = 27896
Step 318: 27896 + 88 = 27984
Step 319: 27984 + 88 = 28072
Step 320: 28072 + 88 = 28160
Step 321: 28160 + 88 = 28248
Step 322: 28248 + 88 = 28336
Step 323: 28336 + 88 = 28424
Step 324: 28424 + 88 = 28512
Step 325: 28512 + 88 = 28600
Step 326: 28600 + 88 = 28688
Step 327: 28688 + 88 = 28776
Step 328: 28776 + 88 = 28864
Step 329: 28864 + 88 = 28952
Step 330: 28952 + 88 = 29040
Step 331: 29040 + 88 = 29128
Step 332: 29128 + 88 = 29216
Step 333: 29216 + 88 = 29304
Step 334: 29304 + 88 = 29392
Step 335: 29392 + 88 = 29480
Step 336: 29480 + 88 = 29568
Step 337: 29568 + 88 = 29656
Step 338: 29656 + 88 = 29744
Step 339: 29744 + 88 = 29832
Step 340: 29832 + 88 = 29920
Step 341: 29920 + 88 = 30008
Step 342: 30008 + 88 = 30096
Step 343: 30096 + 88 = 30184
Step 344: 30184 + 88 = 30272
Step 345: 30272 + 88 = 30360
Step 346: 30360 + 88 = 30448
Step 347: 30448 + 88 = 30536
Step 348: 30536 + 88 = 30624
Step 349: 30624 + 88 = 30712
Step 350: 30712 + 88 = 30800
Step 351: 30800 + 88 = 30888
Step 352: 30888 + 88 = 30976
Step 353: 30976 + 88 = 31064
Step 354: 31064 + 88 = 31152
Step 355: 31152 + 88 = 31240
Step 356: 31240 + 88 = 31328
Step 357: 31328 + 88 = 31416
Step 358: 31416 + 88 = 31504
Step 359: 31504 + 88 = 31592
Step 360: 31592 + 88 = 31680
Step 361: 31680 + 88 = 31768
Step 362: 31768 + 88 = 31856
Step 363: 31856 + 88 = 31944
Step 364: 31944 + 88 = 32032
Step 365: 32032 + 88 = 32120
Step 366: 32120 + 88 = 32208
Step 367: 32208 + 88 = 32296
Step 368: 32296 + 88 = 32384
Step 369: 32384 + 88 = 32472
Step 370: 32472 + 88 = 32560
Step 371: 32560 + 88 = 32648
Step 372: 32648 + 88 = 32736
Step 373: 32736 + 88 = 32824
Step 374: 32824 + 88 = 32912
Step 375: 32912 + 88 = 33000
Step 376: 33000 + 88 = 33088
Step 377: 33088 + 88 = 33176
Step 378: 33176 + 88 = 33264
Step 379: 33264 + 88 = 33352
Step 380: 33352 + 88 = 33440
Step 381: 33440 + 88 = 33528
Step 382: 33528 + 88 = 33616
Step 383: 33616 + 88 = 33704
Step 384: 33704 + 88 = 33792
Step 385: 33792 + 88 = 33880
Step 386: 33880 + 88 = 33968
Step 387: 33968 + 88 = 34056
Step 388: 34056 + 88 = 34144
Step 389: 34144 + 88 = 34232
Step 390: 34232 + 88 = 34320
Step 391: 34320 + 88 = 34408
Step 392: 34408 + 88 = 34496
Step 393: 34496 + 88 = 34584
Step 394: 34584 + 88 = 34672
Step 395: 34672 + 88 = 34760
Step 396: 34760 + 88 = 34848
Step 397: 34848 + 88 = 34936
Step 398: 34936 + 88 = 35024
Step 399: 35024 + 88 = 35112
Step 400: 35112 + 88 = 35200
Step 401: 35200 + 88 = 35288
Step 402: 35288 + 88 = 35376
Step 403: 35376 + 88 = 35464
Step 404: 35464 + 88 = 35552
Step 405: 35552 + 88 = 35640
Step 406: 35640 + 88 = 35728
Step 407: 35728 + 88 = 35816
Step 408: 35816 + 88 = 35904
Step 409: 35904 + 88 = 35992
Step 410: 35992 + 88 = 36080
Step 411: 36080 + 88 = 36168
Step 412: 36168 + 88 = 36256
Step 413: 36256 + 88 = 36344
Step 414: 36344 + 88 = 36432
Step 415: 36432 + 88 = 36520
Step 416: 36520 + 88 = 36608
Step 417: 36608 + 88 = 36696
Step 418: 36696 + 88 = 36784
Step 419: 36784 + 88 = 36872
Step 420: 36872 + 88 = 36960
Step 421: 36960 + 88 = 37048
Step 422: 37048 + 88 = 37136
Step 423: 37136 + 88 = 37224
Step 424: 37224 + 88 = 37312
Step 425: 37312 + 88 = 37400
Step 426: 37400 + 88 = 37488
Step 427: 37488 + 88 = 37576
Step 428: 37576 + 88 = 37664
Step 429: 37664 + 88 = 37752
Step 430: 37752 + 88 = 37840
Step 431: 37840 + 88 = 37928
Step 432: 37928 + 88 = 38016
Step 433: 38016 + 88 = 38104
Step 434: 38104 + 88 = 38192
Step 435: 38192 + 88 = 38280
Step 436: 38280 + 88 = 38368
Step 437: 38368 + 88 = 38456
Step 438: 38456 + 88 = 38544
Step 439: 38544 + 88 = 38632
Step 440: 38632 + 88 = 38720
Step 441: 38720 + 88 = 38808
Step 442: 38808 + 88 = 38896
Step 443: 38896 + 88 = 38984
Step 444: 38984 + 88 = 39072
Step 445: 39072 + 88 = 39160
Step 446: 39160 + 88 = 39248
Step 447: 39248 + 88 = 39336
Step 448: 39336 + 88 = 39424
Step 449: 39424 + 88 = 39512
Step 450: 39512 + 88 = 39600

So, 88*450 = 39600