OK, let's crack this. We're given 525 and our task is to multiply it by 351. Essentially, we'll be adding 525 to itself 351 times.
Step 1: 0 + 525 = 525
Step 2: 525 + 525 = 1050
Step 3: 1050 + 525 = 1575
Step 4: 1575 + 525 = 2100
Step 5: 2100 + 525 = 2625
Step 6: 2625 + 525 = 3150
Step 7: 3150 + 525 = 3675
Step 8: 3675 + 525 = 4200
Step 9: 4200 + 525 = 4725
Step 10: 4725 + 525 = 5250
Step 11: 5250 + 525 = 5775
Step 12: 5775 + 525 = 6300
Step 13: 6300 + 525 = 6825
Step 14: 6825 + 525 = 7350
Step 15: 7350 + 525 = 7875
Step 16: 7875 + 525 = 8400
Step 17: 8400 + 525 = 8925
Step 18: 8925 + 525 = 9450
Step 19: 9450 + 525 = 9975
Step 20: 9975 + 525 = 10500
Step 21: 10500 + 525 = 11025
Step 22: 11025 + 525 = 11550
Step 23: 11550 + 525 = 12075
Step 24: 12075 + 525 = 12600
Step 25: 12600 + 525 = 13125
Step 26: 13125 + 525 = 13650
Step 27: 13650 + 525 = 14175
Step 28: 14175 + 525 = 14700
Step 29: 14700 + 525 = 15225
Step 30: 15225 + 525 = 15750
Step 31: 15750 + 525 = 16275
Step 32: 16275 + 525 = 16800
Step 33: 16800 + 525 = 17325
Step 34: 17325 + 525 = 17850
Step 35: 17850 + 525 = 18375
Step 36: 18375 + 525 = 18900
Step 37: 18900 + 525 = 19425
Step 38: 19425 + 525 = 19950
Step 39: 19950 + 525 = 20475
Step 40: 20475 + 525 = 21000
Step 41: 21000 + 525 = 21525
Step 42: 21525 + 525 = 22050
Step 43: 22050 + 525 = 22575
Step 44: 22575 + 525 = 23100
Step 45: 23100 + 525 = 23625
Step 46: 23625 + 525 = 24150
Step 47: 24150 + 525 = 24675
Step 48: 24675 + 525 = 25200
Step 49: 25200 + 525 = 25725
Step 50: 25725 + 525 = 26250
Step 51: 26250 + 525 = 26775
Step 52: 26775 + 525 = 27300
Step 53: 27300 + 525 = 27825
Step 54: 27825 + 525 = 28350
Step 55: 28350 + 525 = 28875
Step 56: 28875 + 525 = 29400
Step 57: 29400 + 525 = 29925
Step 58: 29925 + 525 = 30450
Step 59: 30450 + 525 = 30975
Step 60: 30975 + 525 = 31500
Step 61: 31500 + 525 = 32025
Step 62: 32025 + 525 = 32550
Step 63: 32550 + 525 = 33075
Step 64: 33075 + 525 = 33600
Step 65: 33600 + 525 = 34125
Step 66: 34125 + 525 = 34650
Step 67: 34650 + 525 = 35175
Step 68: 35175 + 525 = 35700
Step 69: 35700 + 525 = 36225
Step 70: 36225 + 525 = 36750
Step 71: 36750 + 525 = 37275
Step 72: 37275 + 525 = 37800
Step 73: 37800 + 525 = 38325
Step 74: 38325 + 525 = 38850
Step 75: 38850 + 525 = 39375
Step 76: 39375 + 525 = 39900
Step 77: 39900 + 525 = 40425
Step 78: 40425 + 525 = 40950
Step 79: 40950 + 525 = 41475
Step 80: 41475 + 525 = 42000
Step 81: 42000 + 525 = 42525
Step 82: 42525 + 525 = 43050
Step 83: 43050 + 525 = 43575
Step 84: 43575 + 525 = 44100
Step 85: 44100 + 525 = 44625
Step 86: 44625 + 525 = 45150
Step 87: 45150 + 525 = 45675
Step 88: 45675 + 525 = 46200
Step 89: 46200 + 525 = 46725
Step 90: 46725 + 525 = 47250
Step 91: 47250 + 525 = 47775
Step 92: 47775 + 525 = 48300
Step 93: 48300 + 525 = 48825
Step 94: 48825 + 525 = 49350
Step 95: 49350 + 525 = 49875
Step 96: 49875 + 525 = 50400
Step 97: 50400 + 525 = 50925
Step 98: 50925 + 525 = 51450
Step 99: 51450 + 525 = 51975
Step 100: 51975 + 525 = 52500
Step 101: 52500 + 525 = 53025
Step 102: 53025 + 525 = 53550
Step 103: 53550 + 525 = 54075
Step 104: 54075 + 525 = 54600
Step 105: 54600 + 525 = 55125
Step 106: 55125 + 525 = 55650
Step 107: 55650 + 525 = 56175
Step 108: 56175 + 525 = 56700
Step 109: 56700 + 525 = 57225
Step 110: 57225 + 525 = 57750
Step 111: 57750 + 525 = 58275
Step 112: 58275 + 525 = 58800
Step 113: 58800 + 525 = 59325
Step 114: 59325 + 525 = 59850
Step 115: 59850 + 525 = 60375
Step 116: 60375 + 525 = 60900
Step 117: 60900 + 525 = 61425
Step 118: 61425 + 525 = 61950
Step 119: 61950 + 525 = 62475
Step 120: 62475 + 525 = 63000
Step 121: 63000 + 525 = 63525
Step 122: 63525 + 525 = 64050
Step 123: 64050 + 525 = 64575
Step 124: 64575 + 525 = 65100
Step 125: 65100 + 525 = 65625
Step 126: 65625 + 525 = 66150
Step 127: 66150 + 525 = 66675
Step 128: 66675 + 525 = 67200
Step 129: 67200 + 525 = 67725
Step 130: 67725 + 525 = 68250
Step 131: 68250 + 525 = 68775
Step 132: 68775 + 525 = 69300
Step 133: 69300 + 525 = 69825
Step 134: 69825 + 525 = 70350
Step 135: 70350 + 525 = 70875
Step 136: 70875 + 525 = 71400
Step 137: 71400 + 525 = 71925
Step 138: 71925 + 525 = 72450
Step 139: 72450 + 525 = 72975
Step 140: 72975 + 525 = 73500
Step 141: 73500 + 525 = 74025
Step 142: 74025 + 525 = 74550
Step 143: 74550 + 525 = 75075
Step 144: 75075 + 525 = 75600
Step 145: 75600 + 525 = 76125
Step 146: 76125 + 525 = 76650
Step 147: 76650 + 525 = 77175
Step 148: 77175 + 525 = 77700
Step 149: 77700 + 525 = 78225
Step 150: 78225 + 525 = 78750
Step 151: 78750 + 525 = 79275
Step 152: 79275 + 525 = 79800
Step 153: 79800 + 525 = 80325
Step 154: 80325 + 525 = 80850
Step 155: 80850 + 525 = 81375
Step 156: 81375 + 525 = 81900
Step 157: 81900 + 525 = 82425
Step 158: 82425 + 525 = 82950
Step 159: 82950 + 525 = 83475
Step 160: 83475 + 525 = 84000
Step 161: 84000 + 525 = 84525
Step 162: 84525 + 525 = 85050
Step 163: 85050 + 525 = 85575
Step 164: 85575 + 525 = 86100
Step 165: 86100 + 525 = 86625
Step 166: 86625 + 525 = 87150
Step 167: 87150 + 525 = 87675
Step 168: 87675 + 525 = 88200
Step 169: 88200 + 525 = 88725
Step 170: 88725 + 525 = 89250
Step 171: 89250 + 525 = 89775
Step 172: 89775 + 525 = 90300
Step 173: 90300 + 525 = 90825
Step 174: 90825 + 525 = 91350
Step 175: 91350 + 525 = 91875
Step 176: 91875 + 525 = 92400
Step 177: 92400 + 525 = 92925
Step 178: 92925 + 525 = 93450
Step 179: 93450 + 525 = 93975
Step 180: 93975 + 525 = 94500
Step 181: 94500 + 525 = 95025
Step 182: 95025 + 525 = 95550
Step 183: 95550 + 525 = 96075
Step 184: 96075 + 525 = 96600
Step 185: 96600 + 525 = 97125
Step 186: 97125 + 525 = 97650
Step 187: 97650 + 525 = 98175
Step 188: 98175 + 525 = 98700
Step 189: 98700 + 525 = 99225
Step 190: 99225 + 525 = 99750
Step 191: 99750 + 525 = 100275
Step 192: 100275 + 525 = 100800
Step 193: 100800 + 525 = 101325
Step 194: 101325 + 525 = 101850
Step 195: 101850 + 525 = 102375
Step 196: 102375 + 525 = 102900
Step 197: 102900 + 525 = 103425
Step 198: 103425 + 525 = 103950
Step 199: 103950 + 525 = 104475
Step 200: 104475 + 525 = 105000
Step 201: 105000 + 525 = 105525
Step 202: 105525 + 525 = 106050
Step 203: 106050 + 525 = 106575
Step 204: 106575 + 525 = 107100
Step 205: 107100 + 525 = 107625
Step 206: 107625 + 525 = 108150
Step 207: 108150 + 525 = 108675
Step 208: 108675 + 525 = 109200
Step 209: 109200 + 525 = 109725
Step 210: 109725 + 525 = 110250
Step 211: 110250 + 525 = 110775
Step 212: 110775 + 525 = 111300
Step 213: 111300 + 525 = 111825
Step 214: 111825 + 525 = 112350
Step 215: 112350 + 525 = 112875
Step 216: 112875 + 525 = 113400
Step 217: 113400 + 525 = 113925
Step 218: 113925 + 525 = 114450
Step 219: 114450 + 525 = 114975
Step 220: 114975 + 525 = 115500
Step 221: 115500 + 525 = 116025
Step 222: 116025 + 525 = 116550
Step 223: 116550 + 525 = 117075
Step 224: 117075 + 525 = 117600
Step 225: 117600 + 525 = 118125
Step 226: 118125 + 525 = 118650
Step 227: 118650 + 525 = 119175
Step 228: 119175 + 525 = 119700
Step 229: 119700 + 525 = 120225
Step 230: 120225 + 525 = 120750
Step 231: 120750 + 525 = 121275
Step 232: 121275 + 525 = 121800
Step 233: 121800 + 525 = 122325
Step 234: 122325 + 525 = 122850
Step 235: 122850 + 525 = 123375
Step 236: 123375 + 525 = 123900
Step 237: 123900 + 525 = 124425
Step 238: 124425 + 525 = 124950
Step 239: 124950 + 525 = 125475
Step 240: 125475 + 525 = 126000
Step 241: 126000 + 525 = 126525
Step 242: 126525 + 525 = 127050
Step 243: 127050 + 525 = 127575
Step 244: 127575 + 525 = 128100
Step 245: 128100 + 525 = 128625
Step 246: 128625 + 525 = 129150
Step 247: 129150 + 525 = 129675
Step 248: 129675 + 525 = 130200
Step 249: 130200 + 525 = 130725
Step 250: 130725 + 525 = 131250
Step 251: 131250 + 525 = 131775
Step 252: 131775 + 525 = 132300
Step 253: 132300 + 525 = 132825
Step 254: 132825 + 525 = 133350
Step 255: 133350 + 525 = 133875
Step 256: 133875 + 525 = 134400
Step 257: 134400 + 525 = 134925
Step 258: 134925 + 525 = 135450
Step 259: 135450 + 525 = 135975
Step 260: 135975 + 525 = 136500
Step 261: 136500 + 525 = 137025
Step 262: 137025 + 525 = 137550
Step 263: 137550 + 525 = 138075
Step 264: 138075 + 525 = 138600
Step 265: 138600 + 525 = 139125
Step 266: 139125 + 525 = 139650
Step 267: 139650 + 525 = 140175
Step 268: 140175 + 525 = 140700
Step 269: 140700 + 525 = 141225
Step 270: 141225 + 525 = 141750
Step 271: 141750 + 525 = 142275
Step 272: 142275 + 525 = 142800
Step 273: 142800 + 525 = 143325
Step 274: 143325 + 525 = 143850
Step 275: 143850 + 525 = 144375
Step 276: 144375 + 525 = 144900
Step 277: 144900 + 525 = 145425
Step 278: 145425 + 525 = 145950
Step 279: 145950 + 525 = 146475
Step 280: 146475 + 525 = 147000
Step 281: 147000 + 525 = 147525
Step 282: 147525 + 525 = 148050
Step 283: 148050 + 525 = 148575
Step 284: 148575 + 525 = 149100
Step 285: 149100 + 525 = 149625
Step 286: 149625 + 525 = 150150
Step 287: 150150 + 525 = 150675
Step 288: 150675 + 525 = 151200
Step 289: 151200 + 525 = 151725
Step 290: 151725 + 525 = 152250
Step 291: 152250 + 525 = 152775
Step 292: 152775 + 525 = 153300
Step 293: 153300 + 525 = 153825
Step 294: 153825 + 525 = 154350
Step 295: 154350 + 525 = 154875
Step 296: 154875 + 525 = 155400
Step 297: 155400 + 525 = 155925
Step 298: 155925 + 525 = 156450
Step 299: 156450 + 525 = 156975
Step 300: 156975 + 525 = 157500
Step 301: 157500 + 525 = 158025
Step 302: 158025 + 525 = 158550
Step 303: 158550 + 525 = 159075
Step 304: 159075 + 525 = 159600
Step 305: 159600 + 525 = 160125
Step 306: 160125 + 525 = 160650
Step 307: 160650 + 525 = 161175
Step 308: 161175 + 525 = 161700
Step 309: 161700 + 525 = 162225
Step 310: 162225 + 525 = 162750
Step 311: 162750 + 525 = 163275
Step 312: 163275 + 525 = 163800
Step 313: 163800 + 525 = 164325
Step 314: 164325 + 525 = 164850
Step 315: 164850 + 525 = 165375
Step 316: 165375 + 525 = 165900
Step 317: 165900 + 525 = 166425
Step 318: 166425 + 525 = 166950
Step 319: 166950 + 525 = 167475
Step 320: 167475 + 525 = 168000
Step 321: 168000 + 525 = 168525
Step 322: 168525 + 525 = 169050
Step 323: 169050 + 525 = 169575
Step 324: 169575 + 525 = 170100
Step 325: 170100 + 525 = 170625
Step 326: 170625 + 525 = 171150
Step 327: 171150 + 525 = 171675
Step 328: 171675 + 525 = 172200
Step 329: 172200 + 525 = 172725
Step 330: 172725 + 525 = 173250
Step 331: 173250 + 525 = 173775
Step 332: 173775 + 525 = 174300
Step 333: 174300 + 525 = 174825
Step 334: 174825 + 525 = 175350
Step 335: 175350 + 525 = 175875
Step 336: 175875 + 525 = 176400
Step 337: 176400 + 525 = 176925
Step 338: 176925 + 525 = 177450
Step 339: 177450 + 525 = 177975
Step 340: 177975 + 525 = 178500
Step 341: 178500 + 525 = 179025
Step 342: 179025 + 525 = 179550
Step 343: 179550 + 525 = 180075
Step 344: 180075 + 525 = 180600
Step 345: 180600 + 525 = 181125
Step 346: 181125 + 525 = 181650
Step 347: 181650 + 525 = 182175
Step 348: 182175 + 525 = 182700
Step 349: 182700 + 525 = 183225
Step 350: 183225 + 525 = 183750
Step 351: 183750 + 525 = 184275

So, 525*351 = 184275