The base and height of a triangle are both 12cm, what is its area in cm**2.
一个三角形的底和高都是12cm，它的面积是多少cm**2．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<result>72</result>