areaTypes

function areaTypes(input) {
let type = input.shift();
if (type === "square") {
  let sideA = Number(input.shift());
  console.log(type(sideA*sideA).toFixed(3));
} else if (type === "rectangle"){
    let sideB = Number(input.shift());
    let sideC = Number(input.shift());
    console.log((sideB*sideC).toFixed(3))
} else if (type === "circle") {
    let d = Number(input.shift());
    console.log((Math.PI*Math.pow(d,2)));
} else {
    let sideE = Number(input.shift());
    let sideF = Number(input.shift())
    console.log((sideE*sideF/2).toFixed(3))
}
}