Let's roll up our sleeves and solve this. We have 341 and we're going to multiply it by 102, essentially adding 341 to itself 102 times.
Step 1: 0 + 341 = 341
Step 2: 341 + 341 = 682
Step 3: 682 + 341 = 1023
Step 4: 1023 + 341 = 1364
Step 5: 1364 + 341 = 1705
Step 6: 1705 + 341 = 2046
Step 7: 2046 + 341 = 2387
Step 8: 2387 + 341 = 2728
Step 9: 2728 + 341 = 3069
Step 10: 3069 + 341 = 3410
Step 11: 3410 + 341 = 3751
Step 12: 3751 + 341 = 4092
Step 13: 4092 + 341 = 4433
Step 14: 4433 + 341 = 4774
Step 15: 4774 + 341 = 5115
Step 16: 5115 + 341 = 5456
Step 17: 5456 + 341 = 5797
Step 18: 5797 + 341 = 6138
Step 19: 6138 + 341 = 6479
Step 20: 6479 + 341 = 6820
Step 21: 6820 + 341 = 7161
Step 22: 7161 + 341 = 7502
Step 23: 7502 + 341 = 7843
Step 24: 7843 + 341 = 8184
Step 25: 8184 + 341 = 8525
Step 26: 8525 + 341 = 8866
Step 27: 8866 + 341 = 9207
Step 28: 9207 + 341 = 9548
Step 29: 9548 + 341 = 9889
Step 30: 9889 + 341 = 10230
Step 31: 10230 + 341 = 10571
Step 32: 10571 + 341 = 10912
Step 33: 10912 + 341 = 11253
Step 34: 11253 + 341 = 11594
Step 35: 11594 + 341 = 11935
Step 36: 11935 + 341 = 12276
Step 37: 12276 + 341 = 12617
Step 38: 12617 + 341 = 12958
Step 39: 12958 + 341 = 13299
Step 40: 13299 + 341 = 13640
Step 41: 13640 + 341 = 13981
Step 42: 13981 + 341 = 14322
Step 43: 14322 + 341 = 14663
Step 44: 14663 + 341 = 15004
Step 45: 15004 + 341 = 15345
Step 46: 15345 + 341 = 15686
Step 47: 15686 + 341 = 16027
Step 48: 16027 + 341 = 16368
Step 49: 16368 + 341 = 16709
Step 50: 16709 + 341 = 17050
Step 51: 17050 + 341 = 17391
Step 52: 17391 + 341 = 17732
Step 53: 17732 + 341 = 18073
Step 54: 18073 + 341 = 18414
Step 55: 18414 + 341 = 18755
Step 56: 18755 + 341 = 19096
Step 57: 19096 + 341 = 19437
Step 58: 19437 + 341 = 19778
Step 59: 19778 + 341 = 20119
Step 60: 20119 + 341 = 20460
Step 61: 20460 + 341 = 20801
Step 62: 20801 + 341 = 21142
Step 63: 21142 + 341 = 21483
Step 64: 21483 + 341 = 21824
Step 65: 21824 + 341 = 22165
Step 66: 22165 + 341 = 22506
Step 67: 22506 + 341 = 22847
Step 68: 22847 + 341 = 23188
Step 69: 23188 + 341 = 23529
Step 70: 23529 + 341 = 23870
Step 71: 23870 + 341 = 24211
Step 72: 24211 + 341 = 24552
Step 73: 24552 + 341 = 24893
Step 74: 24893 + 341 = 25234
Step 75: 25234 + 341 = 25575
Step 76: 25575 + 341 = 25916
Step 77: 25916 + 341 = 26257
Step 78: 26257 + 341 = 26598
Step 79: 26598 + 341 = 26939
Step 80: 26939 + 341 = 27280
Step 81: 27280 + 341 = 27621
Step 82: 27621 + 341 = 27962
Step 83: 27962 + 341 = 28303
Step 84: 28303 + 341 = 28644
Step 85: 28644 + 341 = 28985
Step 86: 28985 + 341 = 29326
Step 87: 29326 + 341 = 29667
Step 88: 29667 + 341 = 30008
Step 89: 30008 + 341 = 30349
Step 90: 30349 + 341 = 30690
Step 91: 30690 + 341 = 31031
Step 92: 31031 + 341 = 31372
Step 93: 31372 + 341 = 31713
Step 94: 31713 + 341 = 32054
Step 95: 32054 + 341 = 32395
Step 96: 32395 + 341 = 32736
Step 97: 32736 + 341 = 33077
Step 98: 33077 + 341 = 33418
Step 99: 33418 + 341 = 33759
Step 100: 33759 + 341 = 34100
Step 101: 34100 + 341 = 34441
Step 102: 34441 + 341 = 34782

So, 341*102 = 34782