Lele submerged a cube of iron with a side length of 10cm in a cuboid container. After the iron block is taken out, the water level drops by 4 cm. What is the bottom area of the cuboid container in square centimeters?
乐乐把一块棱长是10cm的正方体铁块，浸没在一个长方体容器中．取出铁块后水面下降了4cm，这个长方体容器的底面积多少平方厘米？
<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">10 * 10 * (5/2)</gadget>
<output>250</output>

<result>250</result>