cylinder and a cone have the same base and height. It is known that the volume of the cylinder is 9 cubic meters more than that of the cone. What is the volume of the cone in cubic meters?
一个圆柱与一个圆锥等底等高，已知圆柱的体积比圆锥的体积多9立方米，圆锥的体积是多少立方米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>