The sum of the three-digit numbers is 17, and the sum of the hundreds and tens digits is 3 greater than the ones digit, such as swapping the hundreds digit and the ones digit, the new The number is 495 greater than the original number, find the original number.
三位数的数字之和是17，百位上的数字与十位上的数字的和比个位上的数大3，如把百位上的数字与个位上的数字对调，所得的新数比原数大495，求原数．
<result>287</result>