5 kg of bananas is equal to the price of 4 kg of apples, and 1 kg of apples is 0.40 yuan more expensive than 1 kg of bananas. How much is a banana per kilogram?
5千克香蕉与4千克苹果价钱相等，1千克苹果比1千克香蕉贵0.40元．香蕉每千克多少元？
<gadget id="calculator">4 * 0.4</gadget>
<output>1.6</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">1.6 / 1</gadget>
<output>1.6</output>

<result>1.6</result>