A certain store buys 4 bottles of water for 5 yuan and sells 3 bottles of water for 5 yuan. If you want to make a profit of 200 yuan, how many bottles of water do you need to sell?
某一个商店，买进5元4瓶水，卖出5元3瓶水，问想获利200元，需卖掉多少瓶水？
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/3) - (5/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">200 / (5/12)</gadget>
<output>480</output>

<result>480</result>