10 children line up to go to the movies, counting from the front, Xiaohua is the fifth, and counting from the back, what is Xiaohua's number.
10个小朋友排成一队去看电影，从前面数起，小华是第5个，从后面数起，小华是第多少个．
<gadget id="calculator">10 - 5</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>