The perimeter of a rectangular lawn is 270 meters, and the ratio of length to width is 5:4. What is the area of the land in square meters?
一块长方形草地的周长是270米，长与宽的比是5：4，这块地的面积是多少平方米．
<gadget id="calculator">270 / 2</gadget>
<output>135</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">135 * (5/9)</gadget>
<output>75</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">135 * (4/9)</gadget>
<output>60</output>

<gadget id="calculator">75 * 60</gadget>
<output>4_500</output>

<result>4_500</result>