Let's roll up our sleeves and solve this. We have 425 and we're going to multiply it by 324, essentially adding 425 to itself 324 times.
Step 1: 0 + 425 = 425
Step 2: 425 + 425 = 850
Step 3: 850 + 425 = 1275
Step 4: 1275 + 425 = 1700
Step 5: 1700 + 425 = 2125
Step 6: 2125 + 425 = 2550
Step 7: 2550 + 425 = 2975
Step 8: 2975 + 425 = 3400
Step 9: 3400 + 425 = 3825
Step 10: 3825 + 425 = 4250
Step 11: 4250 + 425 = 4675
Step 12: 4675 + 425 = 5100
Step 13: 5100 + 425 = 5525
Step 14: 5525 + 425 = 5950
Step 15: 5950 + 425 = 6375
Step 16: 6375 + 425 = 6800
Step 17: 6800 + 425 = 7225
Step 18: 7225 + 425 = 7650
Step 19: 7650 + 425 = 8075
Step 20: 8075 + 425 = 8500
Step 21: 8500 + 425 = 8925
Step 22: 8925 + 425 = 9350
Step 23: 9350 + 425 = 9775
Step 24: 9775 + 425 = 10200
Step 25: 10200 + 425 = 10625
Step 26: 10625 + 425 = 11050
Step 27: 11050 + 425 = 11475
Step 28: 11475 + 425 = 11900
Step 29: 11900 + 425 = 12325
Step 30: 12325 + 425 = 12750
Step 31: 12750 + 425 = 13175
Step 32: 13175 + 425 = 13600
Step 33: 13600 + 425 = 14025
Step 34: 14025 + 425 = 14450
Step 35: 14450 + 425 = 14875
Step 36: 14875 + 425 = 15300
Step 37: 15300 + 425 = 15725
Step 38: 15725 + 425 = 16150
Step 39: 16150 + 425 = 16575
Step 40: 16575 + 425 = 17000
Step 41: 17000 + 425 = 17425
Step 42: 17425 + 425 = 17850
Step 43: 17850 + 425 = 18275
Step 44: 18275 + 425 = 18700
Step 45: 18700 + 425 = 19125
Step 46: 19125 + 425 = 19550
Step 47: 19550 + 425 = 19975
Step 48: 19975 + 425 = 20400
Step 49: 20400 + 425 = 20825
Step 50: 20825 + 425 = 21250
Step 51: 21250 + 425 = 21675
Step 52: 21675 + 425 = 22100
Step 53: 22100 + 425 = 22525
Step 54: 22525 + 425 = 22950
Step 55: 22950 + 425 = 23375
Step 56: 23375 + 425 = 23800
Step 57: 23800 + 425 = 24225
Step 58: 24225 + 425 = 24650
Step 59: 24650 + 425 = 25075
Step 60: 25075 + 425 = 25500
Step 61: 25500 + 425 = 25925
Step 62: 25925 + 425 = 26350
Step 63: 26350 + 425 = 26775
Step 64: 26775 + 425 = 27200
Step 65: 27200 + 425 = 27625
Step 66: 27625 + 425 = 28050
Step 67: 28050 + 425 = 28475
Step 68: 28475 + 425 = 28900
Step 69: 28900 + 425 = 29325
Step 70: 29325 + 425 = 29750
Step 71: 29750 + 425 = 30175
Step 72: 30175 + 425 = 30600
Step 73: 30600 + 425 = 31025
Step 74: 31025 + 425 = 31450
Step 75: 31450 + 425 = 31875
Step 76: 31875 + 425 = 32300
Step 77: 32300 + 425 = 32725
Step 78: 32725 + 425 = 33150
Step 79: 33150 + 425 = 33575
Step 80: 33575 + 425 = 34000
Step 81: 34000 + 425 = 34425
Step 82: 34425 + 425 = 34850
Step 83: 34850 + 425 = 35275
Step 84: 35275 + 425 = 35700
Step 85: 35700 + 425 = 36125
Step 86: 36125 + 425 = 36550
Step 87: 36550 + 425 = 36975
Step 88: 36975 + 425 = 37400
Step 89: 37400 + 425 = 37825
Step 90: 37825 + 425 = 38250
Step 91: 38250 + 425 = 38675
Step 92: 38675 + 425 = 39100
Step 93: 39100 + 425 = 39525
Step 94: 39525 + 425 = 39950
Step 95: 39950 + 425 = 40375
Step 96: 40375 + 425 = 40800
Step 97: 40800 + 425 = 41225
Step 98: 41225 + 425 = 41650
Step 99: 41650 + 425 = 42075
Step 100: 42075 + 425 = 42500
Step 101: 42500 + 425 = 42925
Step 102: 42925 + 425 = 43350
Step 103: 43350 + 425 = 43775
Step 104: 43775 + 425 = 44200
Step 105: 44200 + 425 = 44625
Step 106: 44625 + 425 = 45050
Step 107: 45050 + 425 = 45475
Step 108: 45475 + 425 = 45900
Step 109: 45900 + 425 = 46325
Step 110: 46325 + 425 = 46750
Step 111: 46750 + 425 = 47175
Step 112: 47175 + 425 = 47600
Step 113: 47600 + 425 = 48025
Step 114: 48025 + 425 = 48450
Step 115: 48450 + 425 = 48875
Step 116: 48875 + 425 = 49300
Step 117: 49300 + 425 = 49725
Step 118: 49725 + 425 = 50150
Step 119: 50150 + 425 = 50575
Step 120: 50575 + 425 = 51000
Step 121: 51000 + 425 = 51425
Step 122: 51425 + 425 = 51850
Step 123: 51850 + 425 = 52275
Step 124: 52275 + 425 = 52700
Step 125: 52700 + 425 = 53125
Step 126: 53125 + 425 = 53550
Step 127: 53550 + 425 = 53975
Step 128: 53975 + 425 = 54400
Step 129: 54400 + 425 = 54825
Step 130: 54825 + 425 = 55250
Step 131: 55250 + 425 = 55675
Step 132: 55675 + 425 = 56100
Step 133: 56100 + 425 = 56525
Step 134: 56525 + 425 = 56950
Step 135: 56950 + 425 = 57375
Step 136: 57375 + 425 = 57800
Step 137: 57800 + 425 = 58225
Step 138: 58225 + 425 = 58650
Step 139: 58650 + 425 = 59075
Step 140: 59075 + 425 = 59500
Step 141: 59500 + 425 = 59925
Step 142: 59925 + 425 = 60350
Step 143: 60350 + 425 = 60775
Step 144: 60775 + 425 = 61200
Step 145: 61200 + 425 = 61625
Step 146: 61625 + 425 = 62050
Step 147: 62050 + 425 = 62475
Step 148: 62475 + 425 = 62900
Step 149: 62900 + 425 = 63325
Step 150: 63325 + 425 = 63750
Step 151: 63750 + 425 = 64175
Step 152: 64175 + 425 = 64600
Step 153: 64600 + 425 = 65025
Step 154: 65025 + 425 = 65450
Step 155: 65450 + 425 = 65875
Step 156: 65875 + 425 = 66300
Step 157: 66300 + 425 = 66725
Step 158: 66725 + 425 = 67150
Step 159: 67150 + 425 = 67575
Step 160: 67575 + 425 = 68000
Step 161: 68000 + 425 = 68425
Step 162: 68425 + 425 = 68850
Step 163: 68850 + 425 = 69275
Step 164: 69275 + 425 = 69700
Step 165: 69700 + 425 = 70125
Step 166: 70125 + 425 = 70550
Step 167: 70550 + 425 = 70975
Step 168: 70975 + 425 = 71400
Step 169: 71400 + 425 = 71825
Step 170: 71825 + 425 = 72250
Step 171: 72250 + 425 = 72675
Step 172: 72675 + 425 = 73100
Step 173: 73100 + 425 = 73525
Step 174: 73525 + 425 = 73950
Step 175: 73950 + 425 = 74375
Step 176: 74375 + 425 = 74800
Step 177: 74800 + 425 = 75225
Step 178: 75225 + 425 = 75650
Step 179: 75650 + 425 = 76075
Step 180: 76075 + 425 = 76500
Step 181: 76500 + 425 = 76925
Step 182: 76925 + 425 = 77350
Step 183: 77350 + 425 = 77775
Step 184: 77775 + 425 = 78200
Step 185: 78200 + 425 = 78625
Step 186: 78625 + 425 = 79050
Step 187: 79050 + 425 = 79475
Step 188: 79475 + 425 = 79900
Step 189: 79900 + 425 = 80325
Step 190: 80325 + 425 = 80750
Step 191: 80750 + 425 = 81175
Step 192: 81175 + 425 = 81600
Step 193: 81600 + 425 = 82025
Step 194: 82025 + 425 = 82450
Step 195: 82450 + 425 = 82875
Step 196: 82875 + 425 = 83300
Step 197: 83300 + 425 = 83725
Step 198: 83725 + 425 = 84150
Step 199: 84150 + 425 = 84575
Step 200: 84575 + 425 = 85000
Step 201: 85000 + 425 = 85425
Step 202: 85425 + 425 = 85850
Step 203: 85850 + 425 = 86275
Step 204: 86275 + 425 = 86700
Step 205: 86700 + 425 = 87125
Step 206: 87125 + 425 = 87550
Step 207: 87550 + 425 = 87975
Step 208: 87975 + 425 = 88400
Step 209: 88400 + 425 = 88825
Step 210: 88825 + 425 = 89250
Step 211: 89250 + 425 = 89675
Step 212: 89675 + 425 = 90100
Step 213: 90100 + 425 = 90525
Step 214: 90525 + 425 = 90950
Step 215: 90950 + 425 = 91375
Step 216: 91375 + 425 = 91800
Step 217: 91800 + 425 = 92225
Step 218: 92225 + 425 = 92650
Step 219: 92650 + 425 = 93075
Step 220: 93075 + 425 = 93500
Step 221: 93500 + 425 = 93925
Step 222: 93925 + 425 = 94350
Step 223: 94350 + 425 = 94775
Step 224: 94775 + 425 = 95200
Step 225: 95200 + 425 = 95625
Step 226: 95625 + 425 = 96050
Step 227: 96050 + 425 = 96475
Step 228: 96475 + 425 = 96900
Step 229: 96900 + 425 = 97325
Step 230: 97325 + 425 = 97750
Step 231: 97750 + 425 = 98175
Step 232: 98175 + 425 = 98600
Step 233: 98600 + 425 = 99025
Step 234: 99025 + 425 = 99450
Step 235: 99450 + 425 = 99875
Step 236: 99875 + 425 = 100300
Step 237: 100300 + 425 = 100725
Step 238: 100725 + 425 = 101150
Step 239: 101150 + 425 = 101575
Step 240: 101575 + 425 = 102000
Step 241: 102000 + 425 = 102425
Step 242: 102425 + 425 = 102850
Step 243: 102850 + 425 = 103275
Step 244: 103275 + 425 = 103700
Step 245: 103700 + 425 = 104125
Step 246: 104125 + 425 = 104550
Step 247: 104550 + 425 = 104975
Step 248: 104975 + 425 = 105400
Step 249: 105400 + 425 = 105825
Step 250: 105825 + 425 = 106250
Step 251: 106250 + 425 = 106675
Step 252: 106675 + 425 = 107100
Step 253: 107100 + 425 = 107525
Step 254: 107525 + 425 = 107950
Step 255: 107950 + 425 = 108375
Step 256: 108375 + 425 = 108800
Step 257: 108800 + 425 = 109225
Step 258: 109225 + 425 = 109650
Step 259: 109650 + 425 = 110075
Step 260: 110075 + 425 = 110500
Step 261: 110500 + 425 = 110925
Step 262: 110925 + 425 = 111350
Step 263: 111350 + 425 = 111775
Step 264: 111775 + 425 = 112200
Step 265: 112200 + 425 = 112625
Step 266: 112625 + 425 = 113050
Step 267: 113050 + 425 = 113475
Step 268: 113475 + 425 = 113900
Step 269: 113900 + 425 = 114325
Step 270: 114325 + 425 = 114750
Step 271: 114750 + 425 = 115175
Step 272: 115175 + 425 = 115600
Step 273: 115600 + 425 = 116025
Step 274: 116025 + 425 = 116450
Step 275: 116450 + 425 = 116875
Step 276: 116875 + 425 = 117300
Step 277: 117300 + 425 = 117725
Step 278: 117725 + 425 = 118150
Step 279: 118150 + 425 = 118575
Step 280: 118575 + 425 = 119000
Step 281: 119000 + 425 = 119425
Step 282: 119425 + 425 = 119850
Step 283: 119850 + 425 = 120275
Step 284: 120275 + 425 = 120700
Step 285: 120700 + 425 = 121125
Step 286: 121125 + 425 = 121550
Step 287: 121550 + 425 = 121975
Step 288: 121975 + 425 = 122400
Step 289: 122400 + 425 = 122825
Step 290: 122825 + 425 = 123250
Step 291: 123250 + 425 = 123675
Step 292: 123675 + 425 = 124100
Step 293: 124100 + 425 = 124525
Step 294: 124525 + 425 = 124950
Step 295: 124950 + 425 = 125375
Step 296: 125375 + 425 = 125800
Step 297: 125800 + 425 = 126225
Step 298: 126225 + 425 = 126650
Step 299: 126650 + 425 = 127075
Step 300: 127075 + 425 = 127500
Step 301: 127500 + 425 = 127925
Step 302: 127925 + 425 = 128350
Step 303: 128350 + 425 = 128775
Step 304: 128775 + 425 = 129200
Step 305: 129200 + 425 = 129625
Step 306: 129625 + 425 = 130050
Step 307: 130050 + 425 = 130475
Step 308: 130475 + 425 = 130900
Step 309: 130900 + 425 = 131325
Step 310: 131325 + 425 = 131750
Step 311: 131750 + 425 = 132175
Step 312: 132175 + 425 = 132600
Step 313: 132600 + 425 = 133025
Step 314: 133025 + 425 = 133450
Step 315: 133450 + 425 = 133875
Step 316: 133875 + 425 = 134300
Step 317: 134300 + 425 = 134725
Step 318: 134725 + 425 = 135150
Step 319: 135150 + 425 = 135575
Step 320: 135575 + 425 = 136000
Step 321: 136000 + 425 = 136425
Step 322: 136425 + 425 = 136850
Step 323: 136850 + 425 = 137275
Step 324: 137275 + 425 = 137700

So, 425*324 = 137700