Let's roll up our sleeves and solve this. We have 614 and we're going to multiply it by 42, essentially adding 614 to itself 42 times.
Step 1: 0 + 614 = 614
Step 2: 614 + 614 = 1228
Step 3: 1228 + 614 = 1842
Step 4: 1842 + 614 = 2456
Step 5: 2456 + 614 = 3070
Step 6: 3070 + 614 = 3684
Step 7: 3684 + 614 = 4298
Step 8: 4298 + 614 = 4912
Step 9: 4912 + 614 = 5526
Step 10: 5526 + 614 = 6140
Step 11: 6140 + 614 = 6754
Step 12: 6754 + 614 = 7368
Step 13: 7368 + 614 = 7982
Step 14: 7982 + 614 = 8596
Step 15: 8596 + 614 = 9210
Step 16: 9210 + 614 = 9824
Step 17: 9824 + 614 = 10438
Step 18: 10438 + 614 = 11052
Step 19: 11052 + 614 = 11666
Step 20: 11666 + 614 = 12280
Step 21: 12280 + 614 = 12894
Step 22: 12894 + 614 = 13508
Step 23: 13508 + 614 = 14122
Step 24: 14122 + 614 = 14736
Step 25: 14736 + 614 = 15350
Step 26: 15350 + 614 = 15964
Step 27: 15964 + 614 = 16578
Step 28: 16578 + 614 = 17192
Step 29: 17192 + 614 = 17806
Step 30: 17806 + 614 = 18420
Step 31: 18420 + 614 = 19034
Step 32: 19034 + 614 = 19648
Step 33: 19648 + 614 = 20262
Step 34: 20262 + 614 = 20876
Step 35: 20876 + 614 = 21490
Step 36: 21490 + 614 = 22104
Step 37: 22104 + 614 = 22718
Step 38: 22718 + 614 = 23332
Step 39: 23332 + 614 = 23946
Step 40: 23946 + 614 = 24560
Step 41: 24560 + 614 = 25174
Step 42: 25174 + 614 = 25788

So, 614*42 = 25788