A log has a diameter of about 50 cm and a height of about 3 meters. If this log is processed into the largest square log, what is the volume of the square log in cubic meters?
一根圆木直径大约是50厘米，高大约是3米，把这根圆木加工成最大的方木，方木的体积是多少立方米．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) ** 2</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">2 * (1/16) * 3</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>