10 children are doing exercises in a row, Xiaoping is the third from the left, which one should be from the right?
10个小朋友排成一行做操，小萍从左数是第3个，从右数应是第几个？
<gadget id="calculator">10 - 3</gadget>
<output>7</output>

<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<result>8</result>