There is a three-digit number, the number in the tens place is equal to the sum of the number in the ones place and the number in the hundreds place; the sum of the number in the ones place and the number in the tens place is equal to 8; the number in the hundreds place After exchanging the numbers in the ones place with each other, the resulting three-digit number is 99 greater than the original number. Find the three-digit number.
有一个三位数，它的十位上的数字等于个位上的数字与百位上的数字的和；而个位上的数字与十位上的数字的和等于8；百位上的数字与个位上的数字互相调换后，所得的三位数比原数大99．求这个三位数．
<result>253</result>