The length ratio of the three sides of a triangle is 3:4:5, the perimeter of the triangle is 60 cm, what is the length of the longest side of the triangle in cm.
一个三角形的三条边的长度比是3：4：5，这个三角形的周长为60厘米，这个三角形的最长边的长度是多少厘米．
<gadget id="calculator">3 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">60 * (5/12)</gadget>
<output>25</output>

<result>25</result>