Add a 1 before the first digit and after the last digit of a three-digit number, and the resulting five-digit number is 14789 more than the original three-digit number. What is the original number.
把一个三位元数字首位前和末位元后各添写上一个1，这样得到的五位数比原来的三位数增加了14789．原数是多少．
<result>532</result>