A cylindrical plexiglass rod with a volume of 400cm**3 and a bottom area of 4cm**2, cut it into 5 sections on average, how long is each section?
一根圆柱形有机玻璃棒，体积是400cm**3，底面积是4cm**2，把它平均截成5段，每段长多少．
<gadget id="calculator">400 / 4 / 5</gadget>
<output>20</output>

<result>20</result>