There are 600 kilograms of apples in the fruit supermarket, and 22 baskets have been sold, and each basket is 25 kilograms. How many kilograms are left?
水果超市原有600千克苹果，已经卖了22筐，每筐25千克，还剩多少千克．
<gadget id="calculator">25 * 22</gadget>
<output>550</output>

<gadget id="calculator">600 - 550</gadget>
<output>50</output>

<result>50</result>