The three sides of a right triangle are 1.5m, 1.2m, and 0.9m respectively. What is the area of this right triangle?
一个直角三角形的三条边分别是1.5m、1.2m、0.9m，这个直角三角形的面积是多少．
<gadget id="calculator">0.9 / 2</gadget>
<output>0.45</output>

<gadget id="calculator">1.2 * 0.45</gadget>
<output>0.54</output>

<result>0.54</result>