The perimeter of a right-angled triangle is 600 meters, and the ratio of the three sides is 3:4:5. What is the area of this triangle in square meters?
一块直角三角形地的周长是600米，三条边的比是3：4：5，求这块三角形地的面积是多少平方米？
<gadget id="calculator">3 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">600 * (1/4)</gadget>
<output>150</output>

<gadget id="calculator">4 / 12</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">600 * (1/3)</gadget>
<output>200</output>

<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<gadget id="calculator">150 * 100</gadget>
<output>15_000</output>

<result>15_000</result>