A cylinder has a base area of 0.9 square meters and a height of 2 meters, what is its volume?
一个圆柱的底面积是0.9平方米，高是2米，它的体积是多少．
<gadget id="calculator">0.9 * 2</gadget>
<output>1.8</output>

<result>1.8</result>