The two sides of a right triangle are 0.3cm and 0.4cm respectively, and the length of the hypotenuse is 0.5cm. What is the area of the right triangle in cm**2.
一个直角三角形的两条直角边分别是0.3cm和0.4cm，斜边长0.5cm，这个直角三角形的面积是多少cm**2．
<gadget id="calculator">0.4 / 2</gadget>
<output>0.2</output>

<gadget id="calculator">0.3 * 0.2</gadget>
<output>0.06</output>

<result>0.06</result>