Zhang Liang made a cylinder model with a base circumference of 25.12 cm and a height of 20 cm. His classmate Li Qiang made a cone model with a base radius of 4 cm and a height of 20 cm. Then, the volume of the model made by Li Qiang is the same as the volume of the model made by Zhang Liang.
张亮做了一个底面周长为25.12厘米，高为20厘米的圆柱体模型，他的同学李强做了一个底面半径为4厘米，高为20厘米的圆锥体模型．那么，李强做的模型的体积是张亮做的模型体积的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>