How to add 10% extra to product base price?

Hello we are using paid plugin into our site, we want to add something like below with this plugin, so when user change currency from GBP to USD then we want to add 10% to product base price then calculate price in new currency.

function return_custom_price($price, $product)
{
global $post, $blog_id;

$product = wc_get_product(‘$post_id’);

$post_id = $post->ID;
$wc_product_id = 67438;
if ($post_id == $wc_product_id) {
$price = 77;
}
return $price;
}
add_filter(‘woocommerce_get_price’, ‘return_custom_price’, 10, 2);