From a rectangle with a length of 12 cm and a width of 9 cm, how many circles with a radius of 1.5 cm can be cut at most?
在一张长12厘米，宽9厘米的长方形中，最多能剪多少个半径是1.5厘米的圆．
<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

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

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>