A triangular shape, the sum of the base and the height is 52 decimeters, and the ratio of the base to the height is 8:5, what is its area?
一个三解形，底与高的和是52分米，底与高的比是8：5，它的面积是多少平方分米？
<gadget id="calculator">8 + 5</gadget>
<output>13</output>

<gadget id="calculator">8 / 13</gadget>
<output>8/13 = around 0.615385</output>

<gadget id="calculator">52 * (8/13)</gadget>
<output>32</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">32 * 10</gadget>
<output>320</output>

<result>320</result>