OK, let's work through this together. We're starting with 745 and we're going to multiply it by 345, which means we add 745 to itself 345 times.
Step 1: 0 + 745 = 745
Step 2: 745 + 745 = 1490
Step 3: 1490 + 745 = 2235
Step 4: 2235 + 745 = 2980
Step 5: 2980 + 745 = 3725
Step 6: 3725 + 745 = 4470
Step 7: 4470 + 745 = 5215
Step 8: 5215 + 745 = 5960
Step 9: 5960 + 745 = 6705
Step 10: 6705 + 745 = 7450
Step 11: 7450 + 745 = 8195
Step 12: 8195 + 745 = 8940
Step 13: 8940 + 745 = 9685
Step 14: 9685 + 745 = 10430
Step 15: 10430 + 745 = 11175
Step 16: 11175 + 745 = 11920
Step 17: 11920 + 745 = 12665
Step 18: 12665 + 745 = 13410
Step 19: 13410 + 745 = 14155
Step 20: 14155 + 745 = 14900
Step 21: 14900 + 745 = 15645
Step 22: 15645 + 745 = 16390
Step 23: 16390 + 745 = 17135
Step 24: 17135 + 745 = 17880
Step 25: 17880 + 745 = 18625
Step 26: 18625 + 745 = 19370
Step 27: 19370 + 745 = 20115
Step 28: 20115 + 745 = 20860
Step 29: 20860 + 745 = 21605
Step 30: 21605 + 745 = 22350
Step 31: 22350 + 745 = 23095
Step 32: 23095 + 745 = 23840
Step 33: 23840 + 745 = 24585
Step 34: 24585 + 745 = 25330
Step 35: 25330 + 745 = 26075
Step 36: 26075 + 745 = 26820
Step 37: 26820 + 745 = 27565
Step 38: 27565 + 745 = 28310
Step 39: 28310 + 745 = 29055
Step 40: 29055 + 745 = 29800
Step 41: 29800 + 745 = 30545
Step 42: 30545 + 745 = 31290
Step 43: 31290 + 745 = 32035
Step 44: 32035 + 745 = 32780
Step 45: 32780 + 745 = 33525
Step 46: 33525 + 745 = 34270
Step 47: 34270 + 745 = 35015
Step 48: 35015 + 745 = 35760
Step 49: 35760 + 745 = 36505
Step 50: 36505 + 745 = 37250
Step 51: 37250 + 745 = 37995
Step 52: 37995 + 745 = 38740
Step 53: 38740 + 745 = 39485
Step 54: 39485 + 745 = 40230
Step 55: 40230 + 745 = 40975
Step 56: 40975 + 745 = 41720
Step 57: 41720 + 745 = 42465
Step 58: 42465 + 745 = 43210
Step 59: 43210 + 745 = 43955
Step 60: 43955 + 745 = 44700
Step 61: 44700 + 745 = 45445
Step 62: 45445 + 745 = 46190
Step 63: 46190 + 745 = 46935
Step 64: 46935 + 745 = 47680
Step 65: 47680 + 745 = 48425
Step 66: 48425 + 745 = 49170
Step 67: 49170 + 745 = 49915
Step 68: 49915 + 745 = 50660
Step 69: 50660 + 745 = 51405
Step 70: 51405 + 745 = 52150
Step 71: 52150 + 745 = 52895
Step 72: 52895 + 745 = 53640
Step 73: 53640 + 745 = 54385
Step 74: 54385 + 745 = 55130
Step 75: 55130 + 745 = 55875
Step 76: 55875 + 745 = 56620
Step 77: 56620 + 745 = 57365
Step 78: 57365 + 745 = 58110
Step 79: 58110 + 745 = 58855
Step 80: 58855 + 745 = 59600
Step 81: 59600 + 745 = 60345
Step 82: 60345 + 745 = 61090
Step 83: 61090 + 745 = 61835
Step 84: 61835 + 745 = 62580
Step 85: 62580 + 745 = 63325
Step 86: 63325 + 745 = 64070
Step 87: 64070 + 745 = 64815
Step 88: 64815 + 745 = 65560
Step 89: 65560 + 745 = 66305
Step 90: 66305 + 745 = 67050
Step 91: 67050 + 745 = 67795
Step 92: 67795 + 745 = 68540
Step 93: 68540 + 745 = 69285
Step 94: 69285 + 745 = 70030
Step 95: 70030 + 745 = 70775
Step 96: 70775 + 745 = 71520
Step 97: 71520 + 745 = 72265
Step 98: 72265 + 745 = 73010
Step 99: 73010 + 745 = 73755
Step 100: 73755 + 745 = 74500
Step 101: 74500 + 745 = 75245
Step 102: 75245 + 745 = 75990
Step 103: 75990 + 745 = 76735
Step 104: 76735 + 745 = 77480
Step 105: 77480 + 745 = 78225
Step 106: 78225 + 745 = 78970
Step 107: 78970 + 745 = 79715
Step 108: 79715 + 745 = 80460
Step 109: 80460 + 745 = 81205
Step 110: 81205 + 745 = 81950
Step 111: 81950 + 745 = 82695
Step 112: 82695 + 745 = 83440
Step 113: 83440 + 745 = 84185
Step 114: 84185 + 745 = 84930
Step 115: 84930 + 745 = 85675
Step 116: 85675 + 745 = 86420
Step 117: 86420 + 745 = 87165
Step 118: 87165 + 745 = 87910
Step 119: 87910 + 745 = 88655
Step 120: 88655 + 745 = 89400
Step 121: 89400 + 745 = 90145
Step 122: 90145 + 745 = 90890
Step 123: 90890 + 745 = 91635
Step 124: 91635 + 745 = 92380
Step 125: 92380 + 745 = 93125
Step 126: 93125 + 745 = 93870
Step 127: 93870 + 745 = 94615
Step 128: 94615 + 745 = 95360
Step 129: 95360 + 745 = 96105
Step 130: 96105 + 745 = 96850
Step 131: 96850 + 745 = 97595
Step 132: 97595 + 745 = 98340
Step 133: 98340 + 745 = 99085
Step 134: 99085 + 745 = 99830
Step 135: 99830 + 745 = 100575
Step 136: 100575 + 745 = 101320
Step 137: 101320 + 745 = 102065
Step 138: 102065 + 745 = 102810
Step 139: 102810 + 745 = 103555
Step 140: 103555 + 745 = 104300
Step 141: 104300 + 745 = 105045
Step 142: 105045 + 745 = 105790
Step 143: 105790 + 745 = 106535
Step 144: 106535 + 745 = 107280
Step 145: 107280 + 745 = 108025
Step 146: 108025 + 745 = 108770
Step 147: 108770 + 745 = 109515
Step 148: 109515 + 745 = 110260
Step 149: 110260 + 745 = 111005
Step 150: 111005 + 745 = 111750
Step 151: 111750 + 745 = 112495
Step 152: 112495 + 745 = 113240
Step 153: 113240 + 745 = 113985
Step 154: 113985 + 745 = 114730
Step 155: 114730 + 745 = 115475
Step 156: 115475 + 745 = 116220
Step 157: 116220 + 745 = 116965
Step 158: 116965 + 745 = 117710
Step 159: 117710 + 745 = 118455
Step 160: 118455 + 745 = 119200
Step 161: 119200 + 745 = 119945
Step 162: 119945 + 745 = 120690
Step 163: 120690 + 745 = 121435
Step 164: 121435 + 745 = 122180
Step 165: 122180 + 745 = 122925
Step 166: 122925 + 745 = 123670
Step 167: 123670 + 745 = 124415
Step 168: 124415 + 745 = 125160
Step 169: 125160 + 745 = 125905
Step 170: 125905 + 745 = 126650
Step 171: 126650 + 745 = 127395
Step 172: 127395 + 745 = 128140
Step 173: 128140 + 745 = 128885
Step 174: 128885 + 745 = 129630
Step 175: 129630 + 745 = 130375
Step 176: 130375 + 745 = 131120
Step 177: 131120 + 745 = 131865
Step 178: 131865 + 745 = 132610
Step 179: 132610 + 745 = 133355
Step 180: 133355 + 745 = 134100
Step 181: 134100 + 745 = 134845
Step 182: 134845 + 745 = 135590
Step 183: 135590 + 745 = 136335
Step 184: 136335 + 745 = 137080
Step 185: 137080 + 745 = 137825
Step 186: 137825 + 745 = 138570
Step 187: 138570 + 745 = 139315
Step 188: 139315 + 745 = 140060
Step 189: 140060 + 745 = 140805
Step 190: 140805 + 745 = 141550
Step 191: 141550 + 745 = 142295
Step 192: 142295 + 745 = 143040
Step 193: 143040 + 745 = 143785
Step 194: 143785 + 745 = 144530
Step 195: 144530 + 745 = 145275
Step 196: 145275 + 745 = 146020
Step 197: 146020 + 745 = 146765
Step 198: 146765 + 745 = 147510
Step 199: 147510 + 745 = 148255
Step 200: 148255 + 745 = 149000
Step 201: 149000 + 745 = 149745
Step 202: 149745 + 745 = 150490
Step 203: 150490 + 745 = 151235
Step 204: 151235 + 745 = 151980
Step 205: 151980 + 745 = 152725
Step 206: 152725 + 745 = 153470
Step 207: 153470 + 745 = 154215
Step 208: 154215 + 745 = 154960
Step 209: 154960 + 745 = 155705
Step 210: 155705 + 745 = 156450
Step 211: 156450 + 745 = 157195
Step 212: 157195 + 745 = 157940
Step 213: 157940 + 745 = 158685
Step 214: 158685 + 745 = 159430
Step 215: 159430 + 745 = 160175
Step 216: 160175 + 745 = 160920
Step 217: 160920 + 745 = 161665
Step 218: 161665 + 745 = 162410
Step 219: 162410 + 745 = 163155
Step 220: 163155 + 745 = 163900
Step 221: 163900 + 745 = 164645
Step 222: 164645 + 745 = 165390
Step 223: 165390 + 745 = 166135
Step 224: 166135 + 745 = 166880
Step 225: 166880 + 745 = 167625
Step 226: 167625 + 745 = 168370
Step 227: 168370 + 745 = 169115
Step 228: 169115 + 745 = 169860
Step 229: 169860 + 745 = 170605
Step 230: 170605 + 745 = 171350
Step 231: 171350 + 745 = 172095
Step 232: 172095 + 745 = 172840
Step 233: 172840 + 745 = 173585
Step 234: 173585 + 745 = 174330
Step 235: 174330 + 745 = 175075
Step 236: 175075 + 745 = 175820
Step 237: 175820 + 745 = 176565
Step 238: 176565 + 745 = 177310
Step 239: 177310 + 745 = 178055
Step 240: 178055 + 745 = 178800
Step 241: 178800 + 745 = 179545
Step 242: 179545 + 745 = 180290
Step 243: 180290 + 745 = 181035
Step 244: 181035 + 745 = 181780
Step 245: 181780 + 745 = 182525
Step 246: 182525 + 745 = 183270
Step 247: 183270 + 745 = 184015
Step 248: 184015 + 745 = 184760
Step 249: 184760 + 745 = 185505
Step 250: 185505 + 745 = 186250
Step 251: 186250 + 745 = 186995
Step 252: 186995 + 745 = 187740
Step 253: 187740 + 745 = 188485
Step 254: 188485 + 745 = 189230
Step 255: 189230 + 745 = 189975
Step 256: 189975 + 745 = 190720
Step 257: 190720 + 745 = 191465
Step 258: 191465 + 745 = 192210
Step 259: 192210 + 745 = 192955
Step 260: 192955 + 745 = 193700
Step 261: 193700 + 745 = 194445
Step 262: 194445 + 745 = 195190
Step 263: 195190 + 745 = 195935
Step 264: 195935 + 745 = 196680
Step 265: 196680 + 745 = 197425
Step 266: 197425 + 745 = 198170
Step 267: 198170 + 745 = 198915
Step 268: 198915 + 745 = 199660
Step 269: 199660 + 745 = 200405
Step 270: 200405 + 745 = 201150
Step 271: 201150 + 745 = 201895
Step 272: 201895 + 745 = 202640
Step 273: 202640 + 745 = 203385
Step 274: 203385 + 745 = 204130
Step 275: 204130 + 745 = 204875
Step 276: 204875 + 745 = 205620
Step 277: 205620 + 745 = 206365
Step 278: 206365 + 745 = 207110
Step 279: 207110 + 745 = 207855
Step 280: 207855 + 745 = 208600
Step 281: 208600 + 745 = 209345
Step 282: 209345 + 745 = 210090
Step 283: 210090 + 745 = 210835
Step 284: 210835 + 745 = 211580
Step 285: 211580 + 745 = 212325
Step 286: 212325 + 745 = 213070
Step 287: 213070 + 745 = 213815
Step 288: 213815 + 745 = 214560
Step 289: 214560 + 745 = 215305
Step 290: 215305 + 745 = 216050
Step 291: 216050 + 745 = 216795
Step 292: 216795 + 745 = 217540
Step 293: 217540 + 745 = 218285
Step 294: 218285 + 745 = 219030
Step 295: 219030 + 745 = 219775
Step 296: 219775 + 745 = 220520
Step 297: 220520 + 745 = 221265
Step 298: 221265 + 745 = 222010
Step 299: 222010 + 745 = 222755
Step 300: 222755 + 745 = 223500
Step 301: 223500 + 745 = 224245
Step 302: 224245 + 745 = 224990
Step 303: 224990 + 745 = 225735
Step 304: 225735 + 745 = 226480
Step 305: 226480 + 745 = 227225
Step 306: 227225 + 745 = 227970
Step 307: 227970 + 745 = 228715
Step 308: 228715 + 745 = 229460
Step 309: 229460 + 745 = 230205
Step 310: 230205 + 745 = 230950
Step 311: 230950 + 745 = 231695
Step 312: 231695 + 745 = 232440
Step 313: 232440 + 745 = 233185
Step 314: 233185 + 745 = 233930
Step 315: 233930 + 745 = 234675
Step 316: 234675 + 745 = 235420
Step 317: 235420 + 745 = 236165
Step 318: 236165 + 745 = 236910
Step 319: 236910 + 745 = 237655
Step 320: 237655 + 745 = 238400
Step 321: 238400 + 745 = 239145
Step 322: 239145 + 745 = 239890
Step 323: 239890 + 745 = 240635
Step 324: 240635 + 745 = 241380
Step 325: 241380 + 745 = 242125
Step 326: 242125 + 745 = 242870
Step 327: 242870 + 745 = 243615
Step 328: 243615 + 745 = 244360
Step 329: 244360 + 745 = 245105
Step 330: 245105 + 745 = 245850
Step 331: 245850 + 745 = 246595
Step 332: 246595 + 745 = 247340
Step 333: 247340 + 745 = 248085
Step 334: 248085 + 745 = 248830
Step 335: 248830 + 745 = 249575
Step 336: 249575 + 745 = 250320
Step 337: 250320 + 745 = 251065
Step 338: 251065 + 745 = 251810
Step 339: 251810 + 745 = 252555
Step 340: 252555 + 745 = 253300
Step 341: 253300 + 745 = 254045
Step 342: 254045 + 745 = 254790
Step 343: 254790 + 745 = 255535
Step 344: 255535 + 745 = 256280
Step 345: 256280 + 745 = 257025

So, 745*345 = 257025