math - Calculation in Javascript without rounding decimal numbers -

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Friends, I've got a text box in which users can enter valid decimal numbers.

And then calculate it without having scored with this decimal number.

Currently I am working as 

  var pricePerItemExVat = Math.round ($ ("(#innerCaseWsp"). Val ()) / Math. ($ ("#increasium SLUNIT") .Val ());   
 How can I do without spinning the number?   
 
 
 It seems that you get  Math.round  Is used.  
 Parsing only the strings using numbers:  
  var pricePerItemExVat = ParseFloat ($ ("#InnerCaseWsp"). Val ()) / parseFloat ($ (" #InnerCaseItemSellUnit "). Val ());

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