A post office distributes 760 letters on Monday, 420 letters on Tuesday morning, and 380 letters in the afternoon. Which day distributes more letters on Monday or Tuesday? How many letters?
某邮局周一分发信件760封，周二上午分发信件420封，下午分发信件380封，周一、周二哪一天分发的信件多？多多少封？
<gadget id="calculator">420 + 380</gadget>
<output>800</output>

<gadget id="calculator">800 - 760</gadget>
<output>40</output>

<result>40</result>