Xiaohong and Xiaoming bought the same amount of money in the supermarket. Xiaohong bought 2 kilograms of apples and 1 kilogram of lychees, and Xiaoming bought 4 kilograms of the same apples. Then the price of 1 kg of lychees is equivalent to the price of how many kg of apples.
小红和小明在超市里买了同样多的钱的东西．小红买了2千克苹果和1千克荔枝，小明买了4千克同样的苹果．那么1千克荔枝的价钱相当于多少千克苹果的价钱．
<gadget id="calculator">4 - 2</gadget>
<output>2</output>

<result>2</result>