The school has a rectangular lawn with a circumference of 160 meters and a ratio of length to width of 5:3. What is the area of the lawn in square meters?
学校有一块长方形草地，周长是160米，长与宽的比是5：3，这块草地的面积是多少平方米？
<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>