An hourglass is a combination of two identical conical containers. The height of a single conical container is 6 cm. The leak can roll out 0.05 cubic centimeters of fine sand per second. It takes 5 minutes to drain all the fine sand. What is the area of the bottom of this hourglass? square centimeter?
沙漏是两个完全相同的圆锥形容器的组合体，单个圆锥形容器高6厘米，漏口每秒可滚出细沙0.05立方厘米，漏完全部细沙用时5分钟，这个沙漏底面积是多少平方厘米？
<gadget id="calculator">0.05 * 300</gadget>
<output>15</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">15 / (1/3) / 6</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>