The perimeter of a triangle is 60 cm and the length ratio of the three sides is 3:4:5. What is the longest side in cm?
一个三角形的周长是60厘米，三条边的长度比是3：4：5，最长边是多少厘米．
<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>