2 times of a number is 9.6 less than 100, what is the half of the number?
一个数的2倍比100少9.6，这个数的一半是多少．
<gadget id="calculator">100 - 9.6</gadget>
<output>90.4</output>

<gadget id="calculator">90.4 / 2 / 2</gadget>
<output>22.6</output>

<result>22.6</result>