Cut a square piece of paper with a side length of 10 decimeters into discs with a radius of 0.5 decimeters, how many such discs can be cut in total.
把一张边长为10分米的正方形纸片，剪成半径是0.5分米的圆片，一共可以剪多少个这样的圆片．
<gadget id="calculator">0.5 * 2</gadget>
<output>1</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<result>100</result>