A mining factory has 4 water pumps, which can pump 256 tons of water in 3.2 hours. Now a pond with 160 tons of water needs to be pumped to full capacity. How many hours can it be filled with the same pump?
某矿厂有4台抽水机，3.2小时共抽水256吨，现在有160吨水的池塘要抽满水，用同样的抽水机几小时能抽满？
<gadget id="calculator">256 / 3.2</gadget>
<output>80</output>

<gadget id="calculator">160 / 80</gadget>
<output>2</output>

<result>2</result>