A's number is 198 less than B's three times, and B's number is 420. What is A's number?
甲数比乙数的3倍少198，乙数是420，甲数是多少？
<gadget id="calculator">420 * 3</gadget>
<output>1_260</output>

<gadget id="calculator">1_260 - 198</gadget>
<output>1_062</output>

<result>1_062</result>