The base of a triangle is 12 cm, and the base is half the height. What is the area of the triangle?
一个三角形的底是12厘米，底是高的一半，这个三角形的面积是多少？
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<result>144</result>