If the perimeter of a rectangle is 60 meters and the ratio of length to width is 5:1, what is its area in square meters?
一个长方形的周长是60米，长和宽的比是5：1，它的面积是多少平方米．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">30 * (5/6)</gadget>
<output>25</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">30 * (1/6)</gadget>
<output>5</output>

<gadget id="calculator">25 * 5</gadget>
<output>125</output>

<result>125</result>