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if as many 7-inch pieces of wire as possible are cut from a

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if as many 7-inch pieces of wire as possible are cut from a wire that is 3 feet long ,what is he total length of the wire that is left over?(12 inches=1foot)
A.1 inch
B 2 inches
C 3inches
D 4 inches
E 5 inches
有一根3英尺的电线,把他分成7英寸长的电线,问分了几次后,共剩下多长的电线?(1英尺=12英寸)
那这根电线共3*12=36英寸,最多分成5根7英寸长的电线,那么用了5*7=35英寸,最后剩下的只有1英寸
答案选a