A triangular piece of paper, the base is 9cm, the base is 1.5 times the height, what is the area of this triangular piece of paper?
一张三角形纸片，底是9cm，底是高的1.5倍，这张三角形纸片的面积是多少．
<gadget id="calculator">9 / 1.5</gadget>
<output>6</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">6 * (9/2)</gadget>
<output>27</output>

<result>27</result>