The bottom plate of the wall clock in the children's bedroom is the largest circle cut out from a rectangular thin iron sheet with a length of 1.2 meters and a width of 0.6 meters. Please calculate how big this circle is?
儿童卧室里的挂钟的底板是从一块长1.2米、宽0.6米的长方形薄铁片中剪下一个最大的圆，请你算算这个圆有多大呢？
<gadget id="calculator">0.6 / 2</gadget>
<output>0.3</output>

<gadget id="calculator">0.3 ** 2</gadget>
<output>0.09</output>

<gadget id="calculator">3.14 * 0.09</gadget>
<output>0.2826</output>

<result>0.2826</result>