Problem in my computation result Infinity

Hi..

I have this function:

[code]
function doz(oText){
var P27_max = document.getElementById(“P27_max”).value;
//var P27_max_convert = parseFloat(P27_max) + parseFloat(1);
var P27_max_convert = ((parseFloat(P27_max) * parseFloat(1000)) / parseFloat(0.00) / parseFloat(12));
if( !isNaN(P27_max_convert) ){
var P27_maxdoz = document.getElementById(“P27_maxdoz”).value = P27_max_convert.toFixed(2);
}

var P28_max = document.getElementById(“P28_max”).value;
// var P28_max_convert = parseFloat(P28_max) + parseFloat(2);
var P28_max_convert = ((parseFloat(P28_max) * parseFloat(1000)) / parseFloat(22.00) / parseFloat(12));
if( !isNaN(P28_max_convert) ){
var P28_maxdoz = document.getElementById(“P28_maxdoz”).value = P28_max_convert.toFixed(2);
}
}
[/code]

my output is Infinity..

what’s wrong in my computation :

var P28_max_convert = ((parseFloat(P28_max) * parseFloat(1000)) / parseFloat(22.00) / parseFloat(12));

Thank you

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