A cylinder and a cone have the same base and height, if the volume of the cylinder is 4.2 cubic centimeters larger than that of the cone, what is the volume of the cone in cubic centimeters?
一个圆柱与一个圆锥等底等高，如果圆柱比圆锥的体积多4.2立方厘米，则圆锥的体积是多少立方厘米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">4.2 / 2</gadget>
<output>2.1</output>

<result>2.1</result>