Pour (1/5) of a pot of coffee into a cup, which is 10 ml short of the cup being full. If you pour (1/4) of this pot of coffee into this cup, it will just fill the cup. How many milliliters is this pot of coffee?
将一壶咖啡的(1/5)倒入一个杯子中，离杯子满还差10毫升．如果将这壶咖啡的(1/4)倒入这个杯子，正好装满杯子．这壶咖啡有多少毫升？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">10 / (1/20)</gadget>
<output>200</output>

<result>200</result>