The minute hand of an ancient clock is 15 cm long, what is the area swept in 2 hours in square centimeters?
一座古钟的分针长15厘米，经过2小时扫过的面积是多少平方厘米．
<gadget id="calculator">15 ** 2</gadget>
<output>225</output>

<gadget id="calculator">3.14 * 225 * 2</gadget>
<output>1_413</output>

<result>1_413</result>