Young Pioneers collect plastic waste. The two teams collected a total of 7.81 kg. The first team collected 3.73 kilograms, how many kilograms did the second team collect?
少先队员收集废塑料．两个小队一共收集了7.81千克．第一小队收集了3.73千克，第二小队收集了多少千克？
<gadget id="calculator">7.81 - 3.73</gadget>
<output>4.08</output>

<result>4.08</result>