A cylinder and a cone have the same base and height, if the sum of their volumes is 80 cubic meters, what is the volume of the cylinder in cubic meters?
一个圆柱和一个圆锥等底等高，如果它们的体积和是80立方米，那么圆柱的体积是多少立方米．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<result>60</result>