A rectangular garden is 8 meters long and 50 decimeters wide. How many meters is the length of the wooden fence to surround the flowerbed?
一个长方形花圃长8米，宽50分米．要在花圃的四周围一圈木栏，围木栏的长度是多少米？
<gadget id="calculator">50 / 10</gadget>
<output>5</output>

<gadget id="calculator">8 + 5</gadget>
<output>13</output>

<gadget id="calculator">2 * 13</gadget>
<output>26</output>

<result>26</result>