To cut a circle with a diameter of 20 cm from a paper with a length of 2 m and a width of 1 m, how many circles can be cut at most?
要从一个长2m、宽1m的纸上截取直径为20cm的圆，最多能截多少个．
<gadget id="calculator">100 / 20</gadget>
<output>5</output>

<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">1 * 5</gadget>
<output>5</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<result>50</result>