A cart of logs is brought from a certain place, with a total of 50 logs. The diameter of each log is 0.4 meters and the length is 6 meters. What is the approximate volume of this cart of logs?
从某地运来一车圆木，共50根，每根圆木的直径是0.4米，长是6米，这车圆木的体积大约是多少？
<gadget id="calculator">0.4 / 2</gadget>
<output>0.2</output>

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

<gadget id="calculator">3.14 * 0.04 * 6 * 50</gadget>
<output>37.68</output>

<result>37.68</result>