What is the difference between 27.2 and the sum of 11.8 and 13?
27.2减去11.8与13的和，差是多少？
<gadget id="calculator">11.8 + 13</gadget>
<output>24.8</output>

<gadget id="calculator">27.2 - 24.8</gadget>
<output>2.4</output>

<result>2.4</result>