Draw a circle with a radius of 1 cm inside a rectangle with a length of 6 cm and a width of 4 cm. How many such circles can be drawn at most?
在一张长6厘米，宽4厘米的长方形内画半径是1厘米的圆，这样的圆最多能画多少个．
<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>