From a rectangular iron plate with a length of 12 decimeters and a width of 6 decimeters, how many circular iron plates with a diameter of 2 decimeters can be cut at most.
在一块长12分米、宽6分米的长方形铁板上，最多能截取多少个直径是2分米的圆形铁板．
<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>