A natural number removes its hundreds digit to obtain a new natural number, and removes its ones digit to obtain another new natural number. It is known that the sum of these three natural numbers is 2015. What is the original natural number?
一个自然数去掉它的百位数字得到一个新的自然数，去掉它的个位数字又得到另一个新的自然数，已知这三个自然数的和是2015，则原来的自然数是多少．
<result>1_674</result>