The speed of sound in air is 0.34 km/s, the speed of sound in water is 4.4 times that of air, and the speed of sound in an iron rod is 3.5 times that of water. What is the speed of sound in an iron rod?
声音在空气中的传播速度是0.34千米/秒，在水中的传播速度是空气中的4.4倍，在铁棒中的传播速度是水中的3.5倍，声音在铁棒中的传播速度是多少？
<gadget id="calculator">0.34 * 4.4 * 3.5</gadget>
<output>5.236</output>

<result>5.236</result>