The area of a rectangle is 0.81 square meters, the width is 0.3 meters, how many meters is the length?
一个长方形的面积是0.81平方米，宽是0.3米，长是多少米？
<gadget id="calculator">0.81 / 0.3</gadget>
<output>2.7</output>

<result>2.7</result>