The number of A is 321, and the number of A is 45 more than the number of B. What is the sum of the two numbers of A and B? what is the correct formula
甲数是321，甲数比乙数多45，甲、乙两数的和是多少？正确的算式是多少
<gadget id="calculator">321 - 45</gadget>
<output>276</output>

<gadget id="calculator">276 + 321</gadget>
<output>597</output>

<result>597</result>