When a catastrophic flood and mudslide occurred in Xiaohe Town on July 13, 2010, a rescue vehicle came from a place 450 kilometers away from the disaster area of Xiaohe Town and arrived in 6 hours. How many kilometers per hour did the rescue vehicle travel on average?
在2010年7月13日小河镇发生特大洪涝泥石流灾害时，一辆救援车从离小河镇灾区450千米的地方赶来，6小时到达，这辆救援车平均每小时行多少千米？
<gadget id="calculator">450 / 6</gadget>
<output>75</output>

<result>75</result>