The sum of 3 times a number and 6.5 times it is 2.85, what is this number?
一个数的3倍与它的6.5倍的和是2.85，这个数是多少？
<gadget id="calculator">3 + 6.5</gadget>
<output>9.5</output>

<gadget id="calculator">2.85 / 9.5</gadget>
<output>0.3</output>

<result>0.3</result>