A log is 1 meter long and the circumference of the bottom is 1.256 meters. This log is processed into a square log as large as possible. Find the volume of this square log.
一根圆木，长1米，底面周长1.256米，将这根圆木加工成一根尽可能大的方木料，求这根方木料的体积．
<gadget id="calculator">1.256 / 3.14 / 2</gadget>
<output>0.2</output>

<gadget id="calculator">0.2 ** 2</gadget>
<output>0.04</output>

<gadget id="calculator">2 * 0.04 * 1</gadget>
<output>0.08</output>

<result>0.08</result>