The minute hand of a clock is 10 cm long, what is the area that the pointer sweeps when it makes one revolution?
一个钟表的分针长10厘米，它转一圈指针扫过的面积是多大？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<result>314</result>