The perimeter of a rectangle is 160 meters, and the ratio of length to width is 5:3, what is its area in square meters?
一个长方形的周长是160米，长与宽的比是5：3，它的面积是多少平方米．
<gadget id="calculator">160 / 2</gadget>
<output>80</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">80 * (5/8)</gadget>
<output>50</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">80 * (3/8)</gadget>
<output>30</output>

<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<result>1_500</result>