function calcule2(){
var i=0; for (i=0;i<= 3;i++) {calcule();}}
function calcule(){
Excel2Html.K10.value=(parseFloat(Excel2Html.K13.value)*(parseFloat(Excel2Html.K11.value)+parseFloat(Excel2Html.K12.value)))/parseFloat(Excel2Html.K12.value) ;
Excel2Html.J11.value=(parseFloat(Excel2Html.J12.value)*(parseFloat(Excel2Html.J10.value)-parseFloat(Excel2Html.J13.value)))/parseFloat(Excel2Html.J13.value) ;
Excel2Html.I12.value=(parseFloat(Excel2Html.I13.value)*parseFloat(Excel2Html.I11.value))/(parseFloat(Excel2Html.I10.value)-parseFloat(Excel2Html.I13.value)) ;
Excel2Html.H13.value=(parseFloat(Excel2Html.H10.value)*parseFloat(Excel2Html.H12.value))/(parseFloat(Excel2Html.H11.value)+parseFloat(Excel2Html.H12.value)) ;
}

The below given calculator is a voltage divider calculator. It is in the form of a table. Now in a single column there is only one cell for the unknown value. We need in total 4 values, of which we feed 3 values ( in red cells ) and get the fourth one.
Unknown  Vout R2 R1 Vin
Vin V
R1 Ohm
R2 Ohm
Vout V


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