right triangle with an interior angle of 45 degrees and one side is 12 centimeters, what is the area of the triangle in square centimetres?
一个内角为45度的直角三角形，一条直角边是12厘米，这个三角形的面积是多少平方厘米．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

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

<result>72</result>