The kindergarten needs to buy 20 sets of male and female children's clothing. Boys' clothes are 23 yuan each, and girls' clothes are 31 yuan each. How much does it cost to buy these children's clothes?
幼儿园要买男、女童装各20套．男童装每套23元，女童装每套31元．买这些童装一共要多少元？
<gadget id="calculator">23 * 20</gadget>
<output>460</output>

<gadget id="calculator">31 * 20</gadget>
<output>620</output>

<gadget id="calculator">460 + 620</gadget>
<output>1_080</output>

<result>1_080</result>