A kind of mineral water in Baile optional shopping mall, buy 4 bottles for 5 yuan, sell 3 bottles for 5 yuan, how many bottles need to be sold to make a profit of 100 yuan.
百乐自选商场的一种矿泉水，进货4瓶5元钱，售出3瓶5元钱，要获利100元需要售出多少瓶．
<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">100 / (5/12)</gadget>
<output>240</output>

<result>240</result>