cylindrical container contains water at a height of 5 decimeters. A piece of iron with a volume of 3.14 cubic decimeters is immersed in the water. The water level in the container rises by 2 decimeters. How many liters of water was originally contained in the container?
一个圆柱形容器中盛有5分米高的水，把一块体积为3.14立方分米的铁块浸入水中，容器里的水面高度上升了2分米，这个容器中原来盛有多少升的水？
<gadget id="calculator">3.14 / 2</gadget>
<output>1.57</output>

<gadget id="calculator">1.57 * 5</gadget>
<output>7.85</output>

<result>7.85</result>