How much does the volume increase if the height and base radius of a cone increase (1/4) respectively?
一个圆锥的高和底面半径分别增加(1/4)，则体积增加多少．
<gadget id="calculator">125 / 64</gadget>
<output>125/64 = around 1.953125</output>

<gadget id="calculator">(125/64) - 1</gadget>
<output>61/64 = around 0.953125</output>

<gadget id="calculator">(61/64) / 1</gadget>
<output>61/64 = around 0.953125</output>

<result>61/64 = around 0.953125</result>