In a right triangle, the ratio of the two sides is 2:5, and one side is 6 cm shorter than the other side. What is the area of the triangle in square centimeters?
一个直角三角形，两条直角边的比是2：5，其中一条直角边比另一条直角边短6厘米，这个三角形的面积是多少平方厘米．
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">2 * 2 * 2 * (5/2)</gadget>
<output>20</output>

<result>20</result>