Without delay, let's solve this. We've got 707 and we will be multiplying it by 310, that is, adding 707 to itself 310 times.
Step 1: 0 + 707 = 707
Step 2: 707 + 707 = 1414
Step 3: 1414 + 707 = 2121
Step 4: 2121 + 707 = 2828
Step 5: 2828 + 707 = 3535
Step 6: 3535 + 707 = 4242
Step 7: 4242 + 707 = 4949
Step 8: 4949 + 707 = 5656
Step 9: 5656 + 707 = 6363
Step 10: 6363 + 707 = 7070
Step 11: 7070 + 707 = 7777
Step 12: 7777 + 707 = 8484
Step 13: 8484 + 707 = 9191
Step 14: 9191 + 707 = 9898
Step 15: 9898 + 707 = 10605
Step 16: 10605 + 707 = 11312
Step 17: 11312 + 707 = 12019
Step 18: 12019 + 707 = 12726
Step 19: 12726 + 707 = 13433
Step 20: 13433 + 707 = 14140
Step 21: 14140 + 707 = 14847
Step 22: 14847 + 707 = 15554
Step 23: 15554 + 707 = 16261
Step 24: 16261 + 707 = 16968
Step 25: 16968 + 707 = 17675
Step 26: 17675 + 707 = 18382
Step 27: 18382 + 707 = 19089
Step 28: 19089 + 707 = 19796
Step 29: 19796 + 707 = 20503
Step 30: 20503 + 707 = 21210
Step 31: 21210 + 707 = 21917
Step 32: 21917 + 707 = 22624
Step 33: 22624 + 707 = 23331
Step 34: 23331 + 707 = 24038
Step 35: 24038 + 707 = 24745
Step 36: 24745 + 707 = 25452
Step 37: 25452 + 707 = 26159
Step 38: 26159 + 707 = 26866
Step 39: 26866 + 707 = 27573
Step 40: 27573 + 707 = 28280
Step 41: 28280 + 707 = 28987
Step 42: 28987 + 707 = 29694
Step 43: 29694 + 707 = 30401
Step 44: 30401 + 707 = 31108
Step 45: 31108 + 707 = 31815
Step 46: 31815 + 707 = 32522
Step 47: 32522 + 707 = 33229
Step 48: 33229 + 707 = 33936
Step 49: 33936 + 707 = 34643
Step 50: 34643 + 707 = 35350
Step 51: 35350 + 707 = 36057
Step 52: 36057 + 707 = 36764
Step 53: 36764 + 707 = 37471
Step 54: 37471 + 707 = 38178
Step 55: 38178 + 707 = 38885
Step 56: 38885 + 707 = 39592
Step 57: 39592 + 707 = 40299
Step 58: 40299 + 707 = 41006
Step 59: 41006 + 707 = 41713
Step 60: 41713 + 707 = 42420
Step 61: 42420 + 707 = 43127
Step 62: 43127 + 707 = 43834
Step 63: 43834 + 707 = 44541
Step 64: 44541 + 707 = 45248
Step 65: 45248 + 707 = 45955
Step 66: 45955 + 707 = 46662
Step 67: 46662 + 707 = 47369
Step 68: 47369 + 707 = 48076
Step 69: 48076 + 707 = 48783
Step 70: 48783 + 707 = 49490
Step 71: 49490 + 707 = 50197
Step 72: 50197 + 707 = 50904
Step 73: 50904 + 707 = 51611
Step 74: 51611 + 707 = 52318
Step 75: 52318 + 707 = 53025
Step 76: 53025 + 707 = 53732
Step 77: 53732 + 707 = 54439
Step 78: 54439 + 707 = 55146
Step 79: 55146 + 707 = 55853
Step 80: 55853 + 707 = 56560
Step 81: 56560 + 707 = 57267
Step 82: 57267 + 707 = 57974
Step 83: 57974 + 707 = 58681
Step 84: 58681 + 707 = 59388
Step 85: 59388 + 707 = 60095
Step 86: 60095 + 707 = 60802
Step 87: 60802 + 707 = 61509
Step 88: 61509 + 707 = 62216
Step 89: 62216 + 707 = 62923
Step 90: 62923 + 707 = 63630
Step 91: 63630 + 707 = 64337
Step 92: 64337 + 707 = 65044
Step 93: 65044 + 707 = 65751
Step 94: 65751 + 707 = 66458
Step 95: 66458 + 707 = 67165
Step 96: 67165 + 707 = 67872
Step 97: 67872 + 707 = 68579
Step 98: 68579 + 707 = 69286
Step 99: 69286 + 707 = 69993
Step 100: 69993 + 707 = 70700
Step 101: 70700 + 707 = 71407
Step 102: 71407 + 707 = 72114
Step 103: 72114 + 707 = 72821
Step 104: 72821 + 707 = 73528
Step 105: 73528 + 707 = 74235
Step 106: 74235 + 707 = 74942
Step 107: 74942 + 707 = 75649
Step 108: 75649 + 707 = 76356
Step 109: 76356 + 707 = 77063
Step 110: 77063 + 707 = 77770
Step 111: 77770 + 707 = 78477
Step 112: 78477 + 707 = 79184
Step 113: 79184 + 707 = 79891
Step 114: 79891 + 707 = 80598
Step 115: 80598 + 707 = 81305
Step 116: 81305 + 707 = 82012
Step 117: 82012 + 707 = 82719
Step 118: 82719 + 707 = 83426
Step 119: 83426 + 707 = 84133
Step 120: 84133 + 707 = 84840
Step 121: 84840 + 707 = 85547
Step 122: 85547 + 707 = 86254
Step 123: 86254 + 707 = 86961
Step 124: 86961 + 707 = 87668
Step 125: 87668 + 707 = 88375
Step 126: 88375 + 707 = 89082
Step 127: 89082 + 707 = 89789
Step 128: 89789 + 707 = 90496
Step 129: 90496 + 707 = 91203
Step 130: 91203 + 707 = 91910
Step 131: 91910 + 707 = 92617
Step 132: 92617 + 707 = 93324
Step 133: 93324 + 707 = 94031
Step 134: 94031 + 707 = 94738
Step 135: 94738 + 707 = 95445
Step 136: 95445 + 707 = 96152
Step 137: 96152 + 707 = 96859
Step 138: 96859 + 707 = 97566
Step 139: 97566 + 707 = 98273
Step 140: 98273 + 707 = 98980
Step 141: 98980 + 707 = 99687
Step 142: 99687 + 707 = 100394
Step 143: 100394 + 707 = 101101
Step 144: 101101 + 707 = 101808
Step 145: 101808 + 707 = 102515
Step 146: 102515 + 707 = 103222
Step 147: 103222 + 707 = 103929
Step 148: 103929 + 707 = 104636
Step 149: 104636 + 707 = 105343
Step 150: 105343 + 707 = 106050
Step 151: 106050 + 707 = 106757
Step 152: 106757 + 707 = 107464
Step 153: 107464 + 707 = 108171
Step 154: 108171 + 707 = 108878
Step 155: 108878 + 707 = 109585
Step 156: 109585 + 707 = 110292
Step 157: 110292 + 707 = 110999
Step 158: 110999 + 707 = 111706
Step 159: 111706 + 707 = 112413
Step 160: 112413 + 707 = 113120
Step 161: 113120 + 707 = 113827
Step 162: 113827 + 707 = 114534
Step 163: 114534 + 707 = 115241
Step 164: 115241 + 707 = 115948
Step 165: 115948 + 707 = 116655
Step 166: 116655 + 707 = 117362
Step 167: 117362 + 707 = 118069
Step 168: 118069 + 707 = 118776
Step 169: 118776 + 707 = 119483
Step 170: 119483 + 707 = 120190
Step 171: 120190 + 707 = 120897
Step 172: 120897 + 707 = 121604
Step 173: 121604 + 707 = 122311
Step 174: 122311 + 707 = 123018
Step 175: 123018 + 707 = 123725
Step 176: 123725 + 707 = 124432
Step 177: 124432 + 707 = 125139
Step 178: 125139 + 707 = 125846
Step 179: 125846 + 707 = 126553
Step 180: 126553 + 707 = 127260
Step 181: 127260 + 707 = 127967
Step 182: 127967 + 707 = 128674
Step 183: 128674 + 707 = 129381
Step 184: 129381 + 707 = 130088
Step 185: 130088 + 707 = 130795
Step 186: 130795 + 707 = 131502
Step 187: 131502 + 707 = 132209
Step 188: 132209 + 707 = 132916
Step 189: 132916 + 707 = 133623
Step 190: 133623 + 707 = 134330
Step 191: 134330 + 707 = 135037
Step 192: 135037 + 707 = 135744
Step 193: 135744 + 707 = 136451
Step 194: 136451 + 707 = 137158
Step 195: 137158 + 707 = 137865
Step 196: 137865 + 707 = 138572
Step 197: 138572 + 707 = 139279
Step 198: 139279 + 707 = 139986
Step 199: 139986 + 707 = 140693
Step 200: 140693 + 707 = 141400
Step 201: 141400 + 707 = 142107
Step 202: 142107 + 707 = 142814
Step 203: 142814 + 707 = 143521
Step 204: 143521 + 707 = 144228
Step 205: 144228 + 707 = 144935
Step 206: 144935 + 707 = 145642
Step 207: 145642 + 707 = 146349
Step 208: 146349 + 707 = 147056
Step 209: 147056 + 707 = 147763
Step 210: 147763 + 707 = 148470
Step 211: 148470 + 707 = 149177
Step 212: 149177 + 707 = 149884
Step 213: 149884 + 707 = 150591
Step 214: 150591 + 707 = 151298
Step 215: 151298 + 707 = 152005
Step 216: 152005 + 707 = 152712
Step 217: 152712 + 707 = 153419
Step 218: 153419 + 707 = 154126
Step 219: 154126 + 707 = 154833
Step 220: 154833 + 707 = 155540
Step 221: 155540 + 707 = 156247
Step 222: 156247 + 707 = 156954
Step 223: 156954 + 707 = 157661
Step 224: 157661 + 707 = 158368
Step 225: 158368 + 707 = 159075
Step 226: 159075 + 707 = 159782
Step 227: 159782 + 707 = 160489
Step 228: 160489 + 707 = 161196
Step 229: 161196 + 707 = 161903
Step 230: 161903 + 707 = 162610
Step 231: 162610 + 707 = 163317
Step 232: 163317 + 707 = 164024
Step 233: 164024 + 707 = 164731
Step 234: 164731 + 707 = 165438
Step 235: 165438 + 707 = 166145
Step 236: 166145 + 707 = 166852
Step 237: 166852 + 707 = 167559
Step 238: 167559 + 707 = 168266
Step 239: 168266 + 707 = 168973
Step 240: 168973 + 707 = 169680
Step 241: 169680 + 707 = 170387
Step 242: 170387 + 707 = 171094
Step 243: 171094 + 707 = 171801
Step 244: 171801 + 707 = 172508
Step 245: 172508 + 707 = 173215
Step 246: 173215 + 707 = 173922
Step 247: 173922 + 707 = 174629
Step 248: 174629 + 707 = 175336
Step 249: 175336 + 707 = 176043
Step 250: 176043 + 707 = 176750
Step 251: 176750 + 707 = 177457
Step 252: 177457 + 707 = 178164
Step 253: 178164 + 707 = 178871
Step 254: 178871 + 707 = 179578
Step 255: 179578 + 707 = 180285
Step 256: 180285 + 707 = 180992
Step 257: 180992 + 707 = 181699
Step 258: 181699 + 707 = 182406
Step 259: 182406 + 707 = 183113
Step 260: 183113 + 707 = 183820
Step 261: 183820 + 707 = 184527
Step 262: 184527 + 707 = 185234
Step 263: 185234 + 707 = 185941
Step 264: 185941 + 707 = 186648
Step 265: 186648 + 707 = 187355
Step 266: 187355 + 707 = 188062
Step 267: 188062 + 707 = 188769
Step 268: 188769 + 707 = 189476
Step 269: 189476 + 707 = 190183
Step 270: 190183 + 707 = 190890
Step 271: 190890 + 707 = 191597
Step 272: 191597 + 707 = 192304
Step 273: 192304 + 707 = 193011
Step 274: 193011 + 707 = 193718
Step 275: 193718 + 707 = 194425
Step 276: 194425 + 707 = 195132
Step 277: 195132 + 707 = 195839
Step 278: 195839 + 707 = 196546
Step 279: 196546 + 707 = 197253
Step 280: 197253 + 707 = 197960
Step 281: 197960 + 707 = 198667
Step 282: 198667 + 707 = 199374
Step 283: 199374 + 707 = 200081
Step 284: 200081 + 707 = 200788
Step 285: 200788 + 707 = 201495
Step 286: 201495 + 707 = 202202
Step 287: 202202 + 707 = 202909
Step 288: 202909 + 707 = 203616
Step 289: 203616 + 707 = 204323
Step 290: 204323 + 707 = 205030
Step 291: 205030 + 707 = 205737
Step 292: 205737 + 707 = 206444
Step 293: 206444 + 707 = 207151
Step 294: 207151 + 707 = 207858
Step 295: 207858 + 707 = 208565
Step 296: 208565 + 707 = 209272
Step 297: 209272 + 707 = 209979
Step 298: 209979 + 707 = 210686
Step 299: 210686 + 707 = 211393
Step 300: 211393 + 707 = 212100
Step 301: 212100 + 707 = 212807
Step 302: 212807 + 707 = 213514
Step 303: 213514 + 707 = 214221
Step 304: 214221 + 707 = 214928
Step 305: 214928 + 707 = 215635
Step 306: 215635 + 707 = 216342
Step 307: 216342 + 707 = 217049
Step 308: 217049 + 707 = 217756
Step 309: 217756 + 707 = 218463
Step 310: 218463 + 707 = 219170

So, 707*310 = 219170