A cylinder and a cone have the same base and height, and the sum of their volumes is 120 cubic decimeters. What is the volume of the cylinder?
一个圆柱和一个圆锥等底等高，它们的体积和是120立方分米，圆柱的体积是多少立方分米．
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<result>90</result>