In a rectangle filled with water, a cube iron block with a volume of 1dm**3 is immersed. When the iron block is taken out, the water surface is 2cm. Measured from inside a cuboid, the length is 2.5d, what is the width?
一个盛满水的长方中，浸一个体积为1dm**3方体铁块，把铁块从中取出时，水面2cm．从个长方体里面量，长是2.5d，宽多少？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 2.5</gadget>
<output>0.5</output>

<gadget id="calculator">1 / 0.5</gadget>
<output>2</output>

<result>2</result>