There is a pool of water, 200 tons were released on the first day, 20% more than the first day was released on the second day, and 36% of the whole pool was released on the third day, which happened to be completely drained. How many tons is this pool of water?
有一池水，第一天放出200吨，第二天比第一天多放20%，第三天放了整池水的36%，正好全部放完．这池水共有多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">200 * (6/5)</gadget>
<output>240</output>

<gadget id="calculator">200 + 240</gadget>
<output>440</output>

<gadget id="calculator">36 / 100</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">1 - (9/25)</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">440 / (16/25)</gadget>
<output>1_375/2 = around 687.5</output>

<result>1_375/2 = around 687.5</result>