var sn = document.getElementById("sn")
var mn = document.getElementById("mn")
var ln = document.getElementById("ln")
var bn = document.getElementById("bn")

function f() {
    var n = bn.valueAsNumber;
    n = n || 0;
    sn.innerHTML = Math.round(n*1.5*100/27) / 100;
    mn.innerHTML = Math.round(n*2*100/27) / 100;
    ln.innerHTML = Math.round(n*3*100/27) / 100;
};

bn.addEventListener("input", f);