For a three-digit number, the hundreds place is 5. If you put the 5 in the hundreds place in the ones place, the new three-digit number is 135 less than the original three-digit number. What is the original three-digit number?
一个三位数，百位上是5，如果把百位上的5放到个位上去，新的三位数比原三位数少135，原三位数是多少．
<result>540</result>