Length Of Wire Puzzle - Hint

#156

One of my friend, Shaun asked me to bring a wire from the market. 
I was so confused at that moment, that I accidentally interchanged the feet and inches. 
When he measured the wire that I brought, it was only 5/8 of the length required.
Can you tell, how much wire did Shaun originally asked to bring ??

  Difficulty Level - 3/5

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  Hint : 

   1 foot = 12 inches and some algebra can help you.