Honghong's orchard harvested 420 kilograms of pears this year, and the weight of apples harvested was 18 times that of pears. How many kilograms of apples did Honghong's family harvest this year?
红红家的果园今年收了420千克梨，收的苹果的重量是梨18倍．红红家今年收了多少千克苹果？
<gadget id="calculator">420 * 18</gadget>
<output>7_560</output>

<result>7_560</result>