Mr. Li just formed a triangle with a 27 cm long iron wire, and the centimeters of the three sides are three different prime numbers. How many centimeters is the difference between the longest side and the shortest side of this triangle.
李老师用一根27厘米长的铁丝正好围成了一个三角形，并且三条边长的厘米数是三个不同的质数，这个三角形的最长边与最短边相差多少厘米．
<gadget id="calculator">13 - 3</gadget>
<output>10</output>

<result>10</result>