A triangular piece of land, the length of the base is 30m, the height of this triangle is 8.5m, what is the area of this piece of land in square meters?
一块三角形的土地，底边长为30m，这个三角形的高为8.5m，这块土地的面积是多少平方米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 30 * 8.5</gadget>
<output>127.5</output>

<result>127.5</result>