The base and height of a triangle are both 10dm, what is its area dm**2.
一个三角形的底和高都是10dm，它的面积是多少dm**2．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<result>50</result>