function calculate_it(){
	var v1=document.getElementById("v1").value;
	var v2=document.getElementById("v2").value;
	var v3=document.getElementById("v3").value;
	var v4=document.getElementById("v4").value;
	var vi1,vi2,vi3,vi4,r1,r2;
	vi1=parseInt(v1); vi2=parseInt(v2); vi3=parseInt(v3); vi4=parseInt(v4);
	r1=(2*vi1+2*vi2+vi3)*vi4*0.48*1.05;
	r2=r1*10000;
	document.getElementById("r1").value=Math.round(r1);
	document.getElementById("r2").value=Math.round(r2);
}