Cut a rectangular iron sheet with a length of 12 meters and a width of 8 meters into small circles with a radius of 2 meters (cannot be spliced), how many pieces can be cut at most?
用一块长12米，宽8米的长方形铁片剪成半径是2米的小圆(不能拼接)，最多能剪多少个．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

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

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

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

<result>6</result>