An old Red Army was going to spend 9,900 yuan to help out-of-school children. He first took out 900 yuan to help two out-of-school children. Based on this calculation, how many out-of-school children can be helped with the remaining money?
一位老红军准备拿出9900元救助失学儿童，他首先拿出了900元救助了2名失学儿童，照这样计算，余下的钱还可以救助多少名失学儿童？
<gadget id="calculator">9_900 - 900</gadget>
<output>9_000</output>

<gadget id="calculator">900 / 2</gadget>
<output>450</output>

<gadget id="calculator">9_000 / 450</gadget>
<output>20</output>

<result>20</result>