Li Xin took 10 yuan and bought 1.5 kilograms of bananas, and got back 0.7 yuan. How much is the banana he bought per kilogram?
李欣拿10元钱，买了1.5千克香蕉，找回0.7元，他买的香蕉每千克多少元．
<gadget id="calculator">10 - 0.7</gadget>
<output>9.3</output>

<gadget id="calculator">9.3 / 1.5</gadget>
<output>6.2</output>

<result>6.2</result>