Use 54 cm wire to form a triangle. The length ratio of the three sides of this triangle is 2:3:4. What is the longest side in centimeters?
用54厘米的铁丝围成一个三角形，这个三角形三条边的长度比是2：3：4，最长的边是多少厘米．
<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">54 * (4/9)</gadget>
<output>24</output>

<result>24</result>