Fold a 72 cm long iron wire into a right triangle so that the length of its three sides is 5:4:3. What is the area of this right triangle in square centimeters?
把一根72厘米长的铁丝折成一个直角三角形，使它三条边的长度为5：4：3．这个直角三角形的面积是多少平方厘米？
<gadget id="calculator">5 + 4 + 3</gadget>
<output>12</output>

<gadget id="calculator">4 / 12</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">72 * (1/3)</gadget>
<output>24</output>

<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">72 * (1/4)</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">24 * 9</gadget>
<output>216</output>

<result>216</result>