The height of a cow is 1.68 meters, and the height of an elephant is 0.25 meters less than twice that of a cow. How tall is an elephant?
一头牛高1.68米，一头大象的高度比牛的2倍少0.25米．一头大象高多少米？
<gadget id="calculator">1.68 * 2</gadget>
<output>3.36</output>

<gadget id="calculator">3.36 - 0.25</gadget>
<output>3.11</output>

<result>3.11</result>