Uncle Wang surrounded a rectangular vegetable field with a 72-meter-long fence. The ratio of length to width is 5:3. What is the area of this vegetable field?
王大爷用72米长的篱笆围成一块长方形菜地，长与宽的比是5：3，这块菜地的面积是多少？
<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">36 * (5/8)</gadget>
<output>45/2 = around 22.5</output>

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

<gadget id="calculator">36 * (3/8)</gadget>
<output>27/2 = around 13.5</output>

<gadget id="calculator">(45/2) * (27/2)</gadget>
<output>1_215/4 = around 303.75</output>

<result>1_215/4 = around 303.75</result>