A triangular piece of land has a base of 160 meters and a height half of the base. What is the area of the land in square meters?
一块三角形地，底边是160米，高是底的一半．这块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) * 160</gadget>
<output>80</output>

<gadget id="calculator">(1/2) * 160 * 80</gadget>
<output>6_400</output>

<result>6_400</result>