It costs 3 yuan to buy 1 kilogram of bananas. Now you have 15 yuan. How many kilograms of bananas can you buy?
买1千克香蕉需要3元钱，现有15元钱，可买多少千克的香蕉．
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<result>5</result>