A cylindrical pool with a height of 5 meters is filled with water, and the average daily water consumption is 10 tons. After 10 days, the water in the pool is reduced by 40%. What is the area of the bottom of this pool in square meters? (1 cubic meter of water weighs 1 ton)
一个5米高度的圆柱形水池装满了水，每天平均用去的水是10吨，10天后水池里的水减少了40%．这个水池的底面积是多少平方米？(1立方米水重1吨)
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">10 / (2/5)</gadget>
<output>25</output>

<gadget id="calculator">10 * 25</gadget>
<output>250</output>

<gadget id="calculator">250 / 1 / 5</gadget>
<output>50</output>

<result>50</result>