A number plus (9/2) equals 10, what is the number.
一个数加上(9/2)等于10，这个数是多少．
<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">10 - (9/2)</gadget>
<output>11/2 = around 5.5</output>

<result>11/2 = around 5.5</result>