How can functions with parameters be utilized to simplify calculations in PHP?

Functions with parameters can simplify calculations in PHP by allowing you to pass specific values to the function, which can then be used in the calculations within the function. This can make your code more modular and reusable, as you can easily change the input values without having to rewrite the entire calculation logic. By defining parameters in your function, you can make your code more flexible and easier to maintain.

function calculate_area($length, $width) {
    $area = $length * $width;
    return $area;
}

$length = 5;
$width = 10;
$result = calculate_area($length, $width);
echo "The area is: $result";