bcmul()

<?php
if ( !function_exists( 'bcmul' ) ) :
/**
 * bcmul()
 * @since Geode 1.2.0
 */
function bcmul($n, $m, $dec=0) {

    $value = $n * $m;

    if ($dec) {

        $value = round($value, $dec);

    }

    return $value;

}
endif;