How many circles with a diameter of 2 cm can be cut from a square with a side length of 8 cm?
在边长为8厘米的正方形中剪直径是2厘米的圆，最多可以剪多少个．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>