Using a rectangular piece of paper 10 cm long and 4 cm wide, how many circles with a diameter of 2 cm can be cut at most.
用一张长10厘米、宽4厘米的长方形纸片，最多可以剪多少个直径是2厘米的圆．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

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

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

<result>10</result>