Each basket of pears is 30 kg, and each basket of apples is 20 kg. 21 baskets of pears and 22 baskets of apples, how many kilograms are there in total?
每筐梨30千克，每筐苹果20千克．21筐梨，22筐苹果，一共有多少千克？
<gadget id="calculator">30 * 21</gadget>
<output>630</output>

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

<gadget id="calculator">630 + 440</gadget>
<output>1_070</output>

<result>1_070</result>