The store shipped 3.6 tons of apples. 0.4 tons less than 80% of the oranges shipped. How many tons of oranges did the store ship?
商店运来苹果3.6吨．比运来桔子的80%少0.4吨．商店运来桔子多少吨？
<gadget id="calculator">3.6 + 0.4</gadget>
<output>4</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">4 / (4/5)</gadget>
<output>5</output>

<result>5</result>