"The sum of 1993 and a three-digit number" is a perfect square number, how many such three-digit numbers are there?
"1993与一个三位数的和"是一个完全平方数，这样的三位数有多少个？
<gadget id="calculator">54 - 46</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>