There are two cylinders with the same base area, the ratio of height is 2:3, the volume of the first cylinder is 20 cubic meters, what is the volume of the second cylinder?
有两个底面积相等的圆柱，高的比是2：3，第一个圆柱的体积是20立方米，第二个圆柱的体积是多少立方米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">20 / (2/3)</gadget>
<output>30</output>

<result>30</result>