A double-decker train has a total of 15 carriages. Each carriage has 102 seats on the upper deck and 98 seats on the lower deck. How many passengers can this train hold at most? (Please use two methods to calculate)
一列双层火车，一共有15节车厢，每节车厢上层有102个座位，下层有98个座位，这列火车最多能坐多少乘客？(请用两种方法计算)
<gadget id="calculator">102 * 15</gadget>
<output>1_530</output>

<gadget id="calculator">98 * 15</gadget>
<output>1_470</output>

<gadget id="calculator">1_530 + 1_470</gadget>
<output>3_000</output>

<result>3_000</result>