How many circles of radius 1 cm can be cut out of a rectangle 10 cm long and 2 cm wide?
在长10厘米，宽2厘米的长方形中，最多可剪多少个半径为1厘米的圆．
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

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

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

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

<result>5</result>