The supermarket shipped 20 bags of potatoes and 20 onions each, each bag of potatoes weighed 35 kg, and each bag of onions weighed 45 kg. How many kilograms do these potatoes and onions weigh together?
超市运来马铃薯和洋葱各20袋，每袋马铃薯重35千克，每袋洋葱重45千克．这些马铃薯和洋葱共重多少千克？
<gadget id="calculator">35 + 45</gadget>
<output>80</output>

<gadget id="calculator">80 * 20</gadget>
<output>1_600</output>

<result>1_600</result>