5.5 times a number is 31.25 more than 3 times it, what is this number?
一个数的5.5倍比它的3倍多31.25，这个数是多少？
<gadget id="calculator">5.5 - 3</gadget>
<output>2.5</output>

<gadget id="calculator">31.25 / 2.5</gadget>
<output>12.5</output>

<result>12.5</result>