Let's roll up our sleeves and solve this. We have 778 and we're going to multiply it by 310, essentially adding 778 to itself 310 times.
Step 1: 0 + 778 = 778
Step 2: 778 + 778 = 1556
Step 3: 1556 + 778 = 2334
Step 4: 2334 + 778 = 3112
Step 5: 3112 + 778 = 3890
Step 6: 3890 + 778 = 4668
Step 7: 4668 + 778 = 5446
Step 8: 5446 + 778 = 6224
Step 9: 6224 + 778 = 7002
Step 10: 7002 + 778 = 7780
Step 11: 7780 + 778 = 8558
Step 12: 8558 + 778 = 9336
Step 13: 9336 + 778 = 10114
Step 14: 10114 + 778 = 10892
Step 15: 10892 + 778 = 11670
Step 16: 11670 + 778 = 12448
Step 17: 12448 + 778 = 13226
Step 18: 13226 + 778 = 14004
Step 19: 14004 + 778 = 14782
Step 20: 14782 + 778 = 15560
Step 21: 15560 + 778 = 16338
Step 22: 16338 + 778 = 17116
Step 23: 17116 + 778 = 17894
Step 24: 17894 + 778 = 18672
Step 25: 18672 + 778 = 19450
Step 26: 19450 + 778 = 20228
Step 27: 20228 + 778 = 21006
Step 28: 21006 + 778 = 21784
Step 29: 21784 + 778 = 22562
Step 30: 22562 + 778 = 23340
Step 31: 23340 + 778 = 24118
Step 32: 24118 + 778 = 24896
Step 33: 24896 + 778 = 25674
Step 34: 25674 + 778 = 26452
Step 35: 26452 + 778 = 27230
Step 36: 27230 + 778 = 28008
Step 37: 28008 + 778 = 28786
Step 38: 28786 + 778 = 29564
Step 39: 29564 + 778 = 30342
Step 40: 30342 + 778 = 31120
Step 41: 31120 + 778 = 31898
Step 42: 31898 + 778 = 32676
Step 43: 32676 + 778 = 33454
Step 44: 33454 + 778 = 34232
Step 45: 34232 + 778 = 35010
Step 46: 35010 + 778 = 35788
Step 47: 35788 + 778 = 36566
Step 48: 36566 + 778 = 37344
Step 49: 37344 + 778 = 38122
Step 50: 38122 + 778 = 38900
Step 51: 38900 + 778 = 39678
Step 52: 39678 + 778 = 40456
Step 53: 40456 + 778 = 41234
Step 54: 41234 + 778 = 42012
Step 55: 42012 + 778 = 42790
Step 56: 42790 + 778 = 43568
Step 57: 43568 + 778 = 44346
Step 58: 44346 + 778 = 45124
Step 59: 45124 + 778 = 45902
Step 60: 45902 + 778 = 46680
Step 61: 46680 + 778 = 47458
Step 62: 47458 + 778 = 48236
Step 63: 48236 + 778 = 49014
Step 64: 49014 + 778 = 49792
Step 65: 49792 + 778 = 50570
Step 66: 50570 + 778 = 51348
Step 67: 51348 + 778 = 52126
Step 68: 52126 + 778 = 52904
Step 69: 52904 + 778 = 53682
Step 70: 53682 + 778 = 54460
Step 71: 54460 + 778 = 55238
Step 72: 55238 + 778 = 56016
Step 73: 56016 + 778 = 56794
Step 74: 56794 + 778 = 57572
Step 75: 57572 + 778 = 58350
Step 76: 58350 + 778 = 59128
Step 77: 59128 + 778 = 59906
Step 78: 59906 + 778 = 60684
Step 79: 60684 + 778 = 61462
Step 80: 61462 + 778 = 62240
Step 81: 62240 + 778 = 63018
Step 82: 63018 + 778 = 63796
Step 83: 63796 + 778 = 64574
Step 84: 64574 + 778 = 65352
Step 85: 65352 + 778 = 66130
Step 86: 66130 + 778 = 66908
Step 87: 66908 + 778 = 67686
Step 88: 67686 + 778 = 68464
Step 89: 68464 + 778 = 69242
Step 90: 69242 + 778 = 70020
Step 91: 70020 + 778 = 70798
Step 92: 70798 + 778 = 71576
Step 93: 71576 + 778 = 72354
Step 94: 72354 + 778 = 73132
Step 95: 73132 + 778 = 73910
Step 96: 73910 + 778 = 74688
Step 97: 74688 + 778 = 75466
Step 98: 75466 + 778 = 76244
Step 99: 76244 + 778 = 77022
Step 100: 77022 + 778 = 77800
Step 101: 77800 + 778 = 78578
Step 102: 78578 + 778 = 79356
Step 103: 79356 + 778 = 80134
Step 104: 80134 + 778 = 80912
Step 105: 80912 + 778 = 81690
Step 106: 81690 + 778 = 82468
Step 107: 82468 + 778 = 83246
Step 108: 83246 + 778 = 84024
Step 109: 84024 + 778 = 84802
Step 110: 84802 + 778 = 85580
Step 111: 85580 + 778 = 86358
Step 112: 86358 + 778 = 87136
Step 113: 87136 + 778 = 87914
Step 114: 87914 + 778 = 88692
Step 115: 88692 + 778 = 89470
Step 116: 89470 + 778 = 90248
Step 117: 90248 + 778 = 91026
Step 118: 91026 + 778 = 91804
Step 119: 91804 + 778 = 92582
Step 120: 92582 + 778 = 93360
Step 121: 93360 + 778 = 94138
Step 122: 94138 + 778 = 94916
Step 123: 94916 + 778 = 95694
Step 124: 95694 + 778 = 96472
Step 125: 96472 + 778 = 97250
Step 126: 97250 + 778 = 98028
Step 127: 98028 + 778 = 98806
Step 128: 98806 + 778 = 99584
Step 129: 99584 + 778 = 100362
Step 130: 100362 + 778 = 101140
Step 131: 101140 + 778 = 101918
Step 132: 101918 + 778 = 102696
Step 133: 102696 + 778 = 103474
Step 134: 103474 + 778 = 104252
Step 135: 104252 + 778 = 105030
Step 136: 105030 + 778 = 105808
Step 137: 105808 + 778 = 106586
Step 138: 106586 + 778 = 107364
Step 139: 107364 + 778 = 108142
Step 140: 108142 + 778 = 108920
Step 141: 108920 + 778 = 109698
Step 142: 109698 + 778 = 110476
Step 143: 110476 + 778 = 111254
Step 144: 111254 + 778 = 112032
Step 145: 112032 + 778 = 112810
Step 146: 112810 + 778 = 113588
Step 147: 113588 + 778 = 114366
Step 148: 114366 + 778 = 115144
Step 149: 115144 + 778 = 115922
Step 150: 115922 + 778 = 116700
Step 151: 116700 + 778 = 117478
Step 152: 117478 + 778 = 118256
Step 153: 118256 + 778 = 119034
Step 154: 119034 + 778 = 119812
Step 155: 119812 + 778 = 120590
Step 156: 120590 + 778 = 121368
Step 157: 121368 + 778 = 122146
Step 158: 122146 + 778 = 122924
Step 159: 122924 + 778 = 123702
Step 160: 123702 + 778 = 124480
Step 161: 124480 + 778 = 125258
Step 162: 125258 + 778 = 126036
Step 163: 126036 + 778 = 126814
Step 164: 126814 + 778 = 127592
Step 165: 127592 + 778 = 128370
Step 166: 128370 + 778 = 129148
Step 167: 129148 + 778 = 129926
Step 168: 129926 + 778 = 130704
Step 169: 130704 + 778 = 131482
Step 170: 131482 + 778 = 132260
Step 171: 132260 + 778 = 133038
Step 172: 133038 + 778 = 133816
Step 173: 133816 + 778 = 134594
Step 174: 134594 + 778 = 135372
Step 175: 135372 + 778 = 136150
Step 176: 136150 + 778 = 136928
Step 177: 136928 + 778 = 137706
Step 178: 137706 + 778 = 138484
Step 179: 138484 + 778 = 139262
Step 180: 139262 + 778 = 140040
Step 181: 140040 + 778 = 140818
Step 182: 140818 + 778 = 141596
Step 183: 141596 + 778 = 142374
Step 184: 142374 + 778 = 143152
Step 185: 143152 + 778 = 143930
Step 186: 143930 + 778 = 144708
Step 187: 144708 + 778 = 145486
Step 188: 145486 + 778 = 146264
Step 189: 146264 + 778 = 147042
Step 190: 147042 + 778 = 147820
Step 191: 147820 + 778 = 148598
Step 192: 148598 + 778 = 149376
Step 193: 149376 + 778 = 150154
Step 194: 150154 + 778 = 150932
Step 195: 150932 + 778 = 151710
Step 196: 151710 + 778 = 152488
Step 197: 152488 + 778 = 153266
Step 198: 153266 + 778 = 154044
Step 199: 154044 + 778 = 154822
Step 200: 154822 + 778 = 155600
Step 201: 155600 + 778 = 156378
Step 202: 156378 + 778 = 157156
Step 203: 157156 + 778 = 157934
Step 204: 157934 + 778 = 158712
Step 205: 158712 + 778 = 159490
Step 206: 159490 + 778 = 160268
Step 207: 160268 + 778 = 161046
Step 208: 161046 + 778 = 161824
Step 209: 161824 + 778 = 162602
Step 210: 162602 + 778 = 163380
Step 211: 163380 + 778 = 164158
Step 212: 164158 + 778 = 164936
Step 213: 164936 + 778 = 165714
Step 214: 165714 + 778 = 166492
Step 215: 166492 + 778 = 167270
Step 216: 167270 + 778 = 168048
Step 217: 168048 + 778 = 168826
Step 218: 168826 + 778 = 169604
Step 219: 169604 + 778 = 170382
Step 220: 170382 + 778 = 171160
Step 221: 171160 + 778 = 171938
Step 222: 171938 + 778 = 172716
Step 223: 172716 + 778 = 173494
Step 224: 173494 + 778 = 174272
Step 225: 174272 + 778 = 175050
Step 226: 175050 + 778 = 175828
Step 227: 175828 + 778 = 176606
Step 228: 176606 + 778 = 177384
Step 229: 177384 + 778 = 178162
Step 230: 178162 + 778 = 178940
Step 231: 178940 + 778 = 179718
Step 232: 179718 + 778 = 180496
Step 233: 180496 + 778 = 181274
Step 234: 181274 + 778 = 182052
Step 235: 182052 + 778 = 182830
Step 236: 182830 + 778 = 183608
Step 237: 183608 + 778 = 184386
Step 238: 184386 + 778 = 185164
Step 239: 185164 + 778 = 185942
Step 240: 185942 + 778 = 186720
Step 241: 186720 + 778 = 187498
Step 242: 187498 + 778 = 188276
Step 243: 188276 + 778 = 189054
Step 244: 189054 + 778 = 189832
Step 245: 189832 + 778 = 190610
Step 246: 190610 + 778 = 191388
Step 247: 191388 + 778 = 192166
Step 248: 192166 + 778 = 192944
Step 249: 192944 + 778 = 193722
Step 250: 193722 + 778 = 194500
Step 251: 194500 + 778 = 195278
Step 252: 195278 + 778 = 196056
Step 253: 196056 + 778 = 196834
Step 254: 196834 + 778 = 197612
Step 255: 197612 + 778 = 198390
Step 256: 198390 + 778 = 199168
Step 257: 199168 + 778 = 199946
Step 258: 199946 + 778 = 200724
Step 259: 200724 + 778 = 201502
Step 260: 201502 + 778 = 202280
Step 261: 202280 + 778 = 203058
Step 262: 203058 + 778 = 203836
Step 263: 203836 + 778 = 204614
Step 264: 204614 + 778 = 205392
Step 265: 205392 + 778 = 206170
Step 266: 206170 + 778 = 206948
Step 267: 206948 + 778 = 207726
Step 268: 207726 + 778 = 208504
Step 269: 208504 + 778 = 209282
Step 270: 209282 + 778 = 210060
Step 271: 210060 + 778 = 210838
Step 272: 210838 + 778 = 211616
Step 273: 211616 + 778 = 212394
Step 274: 212394 + 778 = 213172
Step 275: 213172 + 778 = 213950
Step 276: 213950 + 778 = 214728
Step 277: 214728 + 778 = 215506
Step 278: 215506 + 778 = 216284
Step 279: 216284 + 778 = 217062
Step 280: 217062 + 778 = 217840
Step 281: 217840 + 778 = 218618
Step 282: 218618 + 778 = 219396
Step 283: 219396 + 778 = 220174
Step 284: 220174 + 778 = 220952
Step 285: 220952 + 778 = 221730
Step 286: 221730 + 778 = 222508
Step 287: 222508 + 778 = 223286
Step 288: 223286 + 778 = 224064
Step 289: 224064 + 778 = 224842
Step 290: 224842 + 778 = 225620
Step 291: 225620 + 778 = 226398
Step 292: 226398 + 778 = 227176
Step 293: 227176 + 778 = 227954
Step 294: 227954 + 778 = 228732
Step 295: 228732 + 778 = 229510
Step 296: 229510 + 778 = 230288
Step 297: 230288 + 778 = 231066
Step 298: 231066 + 778 = 231844
Step 299: 231844 + 778 = 232622
Step 300: 232622 + 778 = 233400
Step 301: 233400 + 778 = 234178
Step 302: 234178 + 778 = 234956
Step 303: 234956 + 778 = 235734
Step 304: 235734 + 778 = 236512
Step 305: 236512 + 778 = 237290
Step 306: 237290 + 778 = 238068
Step 307: 238068 + 778 = 238846
Step 308: 238846 + 778 = 239624
Step 309: 239624 + 778 = 240402
Step 310: 240402 + 778 = 241180

So, 778*310 = 241180