A double-decker train. Each floor has 15 carriages, the number of people in the upper carriage is 102, and the number of people in the lower carriage is 98. How many passengers can this train take at most?
一列双层火车．每层都是15个车厢，上层车厢人数为102人，下层车厢人数为98人，这列火车最多能坐多少乘客？
<gadget id="calculator">102 + 98</gadget>
<output>200</output>

<gadget id="calculator">200 * 15</gadget>
<output>3_000</output>

<result>3_000</result>