Woocommerce Single product page hooks

In your theme's functions.php add the code,

add_action( 'woocommerce_before_single_product_summary' , 'show_custom_text', 5 );

function show_custom_text() {
  global $product;
  echo '<div class="woocommerce-product-gallery" style="background: #fdfd5a; padding: 1em 2em">';
  echo $product->description;
  echo '</div>';
}