calculate the multiplicand , multiplier , and product eligible for pandigital
function PandigitalProduct_1_9 ( $ n ) { for ( $ i = 1 ; $ i * $ i <= $ n ; $ i ++ ) if ( $ n % $ i == 0 && isPandigital ( strval ( $ n ) . strval ( $ i ) . strval ( ( int ) ( $ n / $ i ) ) ) ) return true ; return false ; }