Cut a piece of rectangular paper with a length of 5 decimeters and a width of 2 decimeters into two identical small rectangles. What is the minimum perimeter of a small rectangle.
把一张长5分米、宽2分米的长方形纸，剪成两个完全一样的小长方形．一个小长方形的周长至少是多少．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) + 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">(9/2) * 2</gadget>
<output>9</output>

<result>9</result>