Add x to 3 times x, and the sum is 96.8, find x.
x加上x的3倍，和是96.8，求x．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">96.8 / 4</gadget>
<output>24.2</output>

<result>24.2</result>