c# - I want to create a jquery for conversion of gold to amount and vice versa -

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problem description : want create jquery method can convert gold weight amount multiplying gold rate f.e 50*2000=100000 , vice versa amount gold dividing gold rate f.e 100000/2000=50

amount=goldweight*goldrate; // top down approach goldweight=amount/goldrate; // bottom approach

but @ same if textbox have values should convert gold if change amount , amount if change in gold value....please me in this..

this answer 

$(document).ready(function() {    $('#txtgoldconverted').focusin(function() {     var r = $('#txtamount').val();     var q = $('#txtgoldrate').val();     if (r != "" && q != "") {       var p = r / q;       var res = p.tofixed(3);       var resround = (math.round(res * 100)) / 100;       $('#txtgoldconverted').val(resround);     }   });    $('#txtgoldconverted').focusout(function() {     var p = $('#txtgoldconverted').val();     var q = $('#txtgoldrate').val();     if (p != "" && q != "") {       var r = p * q;       $('#txtamount').val(r);     }    });    $('#txtgoldrate').focusout(function() {     var p = $('#txtgoldconverted').val();     var q = $('#txtgoldrate').val();     var r = p * q;     $('#txtamount').val(r);   });    $('#txtamount').focusin(function() {     var p = $('#txtgoldconverted').val();     var q = $('#txtgoldrate').val();     if (p != "" && q != "") {       var r = p * q;       $('#txtamount').val(r);     }   });    $('#txtamount').focusout(function() {     var r = $('#txtamount').val();     var q = $('#txtgoldrate').val();     if (r != "" && q != "") {       var p = r / q;       var res = p.tofixed(3);       var resround = (math.round(res * 100)) / 100;       $('#txtgoldconverted').val(res);     }   }); });

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