Apples are 2.4 yuan per kilogram, which is 80% of the price of bananas. How much is the unit price of bananas per kilogram?
苹果每千克2.4元，是香蕉价格的80%，香蕉单价每千克多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2.4 / (4/5)</gadget>
<output>3</output>

<result>3</result>