The store shipped 65 baskets of fruit, and the average weight of each basket is 30 kilograms. After selling 40 baskets, how many kilograms are left?
商店运来水果65筐，平均每筐的重量是30千克，卖出40筐后，还有多少千克？
<gadget id="calculator">65 - 40</gadget>
<output>25</output>

<gadget id="calculator">30 * 25</gadget>
<output>750</output>

<result>750</result>