Cut out a circle with a radius of 1 cm from a rectangular paper with a length of 12 cm and a width of 6 cm. How many pieces can be cut at most?
在长是12cm，宽是6cm的长方形纸中剪出半径是1cm的圆片，最多可以剪多少个．
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">12 / 2 / 2</gadget>
<output>3</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>