The length of the hour hand on the clock face is 1 decimeter, what is the area swept by the hour hand in one day and night?
钟面上时针的长度1分米，一昼夜时针扫过的面积多少π平方分米
<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

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

<result>2</result>