Two cylinders with the same base area, the ratio of their heights is 4:5, the volume of the former is 80 cubic meters, what is the volume of the latter.
两个底面积相等的圆柱，两者高的比是4：5，前者的体积是80立方米，后者的体积是多少．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">80 * (5/4)</gadget>
<output>100</output>

<result>100</result>