27.6 is 6.9 less than three times a number, what is this number?
27.6比一个数的3倍少6.9，这个数是多少？
<gadget id="calculator">6.9 + 27.6</gadget>
<output>34.5</output>

<gadget id="calculator">34.5 / 3</gadget>
<output>11.5</output>

<result>11.5</result>