The height of a cylinder is 4 decimeters, and its volume is 40 cubic decimeters, which is 1 decimeter larger than the volume of a cone with the same base. How many decimeters is the height of this cone?
一个圆柱体高是4分米，体积是40立方分米，比与它等底的圆锥的体积多1分米，这个圆锥的高是多少分米？
<gadget id="calculator">40 - 1</gadget>
<output>39</output>

<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">39 * (3/10)</gadget>
<output>117/10 = around 11.7</output>

<result>117/10 = around 11.7</result>