There are 18 boxes of apples, 25 kg each; 22 boxes of pears, 20 kg each. Based on this information, please ask two different mathematical problems and calculate.
苹果有18箱，每箱25千克；梨有22箱，每箱20千克．根据这些信息，请你提出两个不同的数学问题，并计算．
<gadget id="calculator">25 * 18</gadget>
<output>450</output>

<gadget id="calculator">20 * 22</gadget>
<output>440</output>

<gadget id="calculator">450 + 440</gadget>
<output>890</output>

<result>890</result>