In a right triangle, the lengths of the two sides are 8 cm and 10 cm respectively, what is the area of the right triangle in square centimeters?
一个直角三角形，两条直角边的长分别是8厘米和10厘米，这个直角三角形的面积是多少平方厘米．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<result>40</result>