If the area of the base of a cone remains the same and the height increases by 30%, how much does its volume increase from the original?
一个圆锥的底面积不变，高增加30%，它的体积比原来增加了多少
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>