natural number n satisfies: the sum of n and 200 is a square number, and the sum of n and 292 is another square number. So what is this natural number?
一个自然数n，满足：n与200的和为一个平方数，n与292的和为另一个平方数．那么这个自然数是多少．
<gadget id="calculator">22 ** 2</gadget>
<output>484</output>

<gadget id="calculator">484 - 200</gadget>
<output>284</output>

<result>284</result>