Calculator-math-io

function solve () {
    var equation = document.getElementById('out').value;
    document.getElementById('out').value = eval(equation);
}

function first () { document.getElementById('out').value += '1'; }
function second (){ document.getElementById('out').value += '2'; }
function third () { document.getElementById('out').value += '3'; }
function fourth (){ document.getElementById('out').value += '4'; }
function fifth () { document.getElementById('out').value += '5'; }
function sixth () { document.getElementById('out').value += '6'; }
function seventh(){ document.getElementById('out').value += '7'; }
function eight () { document.getElementById('out').value += '8'; }
function ninth () { document.getElementById('out').value += '9'; }

function adding (){ document.getElementById('out').value += '+'; }
function minus () { document.getElementById('out').value += '-'; }
function delenie(){ document.getElementById('out').value += '/'; }
function multply(){ document.getElementById('out').value += '*'; }