Cut some circles with a radius of 1cm on a piece of rectangular paper with a length of 6cm and a width of 4cm. How many circles can be cut at most?
在一张长6cm，宽4cm的长方形纸上剪一些半径为1cm的圆，最多可以剪多少个？
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

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

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<result>6</result>