After a train arrives at Beijing Railway Station, 294 people get off and 475 get on the train. The current number of passengers is 2085. How many original passengers are there on this train?
一列火车到北京站后，下车294人，上车475人，现有乘客2085人，这列火车原有乘客多少人？
<gadget id="calculator">2_085 - 475</gadget>
<output>1_610</output>

<gadget id="calculator">1_610 + 294</gadget>
<output>1_904</output>

<result>1_904</result>