Saying "4 ft, 2 inches" is the same as saying "4 feet plus 2 inches"
1 foot = 12 inches
4 feet = 48 inches (multiply both sides by 4)
4 feet, 2 inches = 4 ft + 2 in
4 ft, 2 in = 48 in + 2 in
4 ft, 2 in = 50 in
The expression "4 ft, 2 inches" is the same as "50 inches"
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Now we can subtract off 14 inches from this
50 - 14 = 36
We're left with 36 inches which converts to 3 feet because
36/12 = 3
or you can think of it like this
1 ft = 12 in
3 ft = 36 in (multiply both sides by 3)
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Answer: 3 feet