A rectangular colored flag is equal in area to a triangular colored flag. It is known that the length of the rectangular colored flag is 8 decimeters and the width is 5 decimeters. If the height of the triangular colored flag is 10 decimeters, what is the length of its base?
一面长方形彩旗与一面三角形彩旗面积相等．已知长方形彩旗的长是8分米，宽是5分米，如果三角形彩旗的高是10分米，那么它的底长是多少分米？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">8 * 5 * (1/5)</gadget>
<output>8</output>

<result>8</result>