piece of right-angled triangle land, the lengths of the two right-angled sides are 36 meters and 27 meters respectively, what is the area of the land in square meters?
一块直角三角形的地，两条直角边的长分别是36米、27米，这块地的面积是多少平方米．
<gadget id="calculator">27 / 2</gadget>
<output>27/2 = around 13.5</output>

<gadget id="calculator">36 * (27/2)</gadget>
<output>486</output>

<result>486</result>