const errorMessage = 'Illegal rectangle dimensions';

function checkDimensions(length, width) {
    if (length >= 1 && length <= 1000 && width >= 1 && width <= 1000){
        return {
            length: Number(parseFloat(length).toFixed(3)), 
            width:  Number(parseFloat(width).toFixed(3)),
        };
    }
        
    return false;
}

function getArea(length, width) {
    let area;
    // Write your code here
    if(checkDimensions(length, width)){
        let i2D = checkDimensions(length, width);
        area = i2D.length * i2D.width;
        return area;
    }
    
    return errorMessage;
}

function getPerimeter(length, width) {
    let perimeter;
    // Write your code here
    if(checkDimensions(length, width)){
        let i2D = checkDimensions(length, width);
        perimeter = 2 * (i2D.length + i2D.width);
        return perimeter;
    }
    
    return errorMessage;
}