A rectangle is surrounded by a wire 24 decimeters long. The ratio of length to width is 5:1. What is the area of the rectangle?
用一根长24分米的铁丝围成一个长方形，长与宽的比是5：1，这个长方形的面积是多少？
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">24 / 2 / 6</gadget>
<output>2</output>

<gadget id="calculator">2 * 5 * 2 * 1</gadget>
<output>20</output>

<result>20</result>