How many circles with a radius of 1 decimeter can be cut from a square iron sheet with a side length of 6 decimeters
在一张边长为6分米的正方形铁皮上，可以剪下半径为1分米的圆多少个
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>