#lang racket/base
(define (reverse-num a ret)
(if (< a 1)
ret
(reverse-num (floor (/ a 10))
(+ (* ret 10) (floor (modulo a 10))))))
(define (palindrome? a)
(= a (reverse-num a 0)))
(define (search)
(do ((a 0 (+ 1 a))
(ret 0))
((>= a 1000) ret)
(do ((b 0 (+ 1 b)))
((>= b 1000))
(when (palindrome? (* a b))
(set! ret (max ret (* a b)))))))
(display "The biggest product of 2 3-digit numbers that is a palindrome is: ")
(display (search))
(newline)
