The sum of two numbers is 200 more than one of the addends and 300 more than the other. What is the sum of the two addends?
两个数相加的和比其中一个加数多200，比另一个加数多300，原来两个加数的和是多少
<gadget id="calculator">200 + 300</gadget>
<output>500</output>

<result>500</result>