There is a batch of fruit in a fruit shop, and after selling (2/5), it buys 5.5 tons. At this time, the existing apples are 80% of the original apples. How many tons are there in the original apples?
某水果店存有一批水果，售出(2/5)以后又购进5.5吨，这时现存苹果加好是原存苹果的80%，原存苹果有多少吨？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(4/5) - (3/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5.5 / (1/5)</gadget>
<output>27.5</output>

<result>27.5</result>