The base area and height of a cylinder and a cone are equal, and the volume of the cylinder is 7.8 cubic meters, so what is the volume of the cone?
一个圆柱体和一个圆椎体的底面积和高相等，已知圆柱体的体积是7.8立方米，那么圆椎体的体积是多少立方米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">7.8 * (1/3)</gadget>
<output>2.6</output>

<result>2.6</result>