function  dotrout() {
var one = eval(document.theForm.elements[0].value)
var two = eval(document.theForm.elements[1].value)  
var prod = (one  * two *  two) / 800
var prod = Math.round(((one  * two *  two) / 800)*Math.pow(10,2))/Math.pow(10,2)
alert("The estimated weight of your Trout is "  +  prod  +  " pounds!")
}