The number of A is 420, which is 18 more than three times the number of B, so what is the sum of the two numbers of A and B?
甲数是420，比乙数的3倍多18，那么甲乙两数的和是多少．
<gadget id="calculator">420 - 18</gadget>
<output>402</output>

<gadget id="calculator">402 / 3</gadget>
<output>134</output>

<gadget id="calculator">134 + 420</gadget>
<output>554</output>

<result>554</result>