How many circles with a diameter of 2 decimeters can be cut from a rectangular iron plate whose length is 10 decimeters and width is 5 decimeters.
在一个长是10分米，宽是5分米的长方形铁板上，最多能截取多少个直径为2分米的圆．
<gadget id="calculator">4 + 4 + 3</gadget>
<output>11</output>

<result>11</result>