The length of a rectangle is 8.7 meters and three times its width. What is the area of the rectangle?
一个长方形的长是8.7米，是宽的3倍，这个长方形的面积是多少？
<gadget id="calculator">8.7 / 3</gadget>
<output>2.9</output>

<gadget id="calculator">8.7 * 2.9</gadget>
<output>25.23</output>

<result>25.23</result>