Donglin Primary School needs to buy a reading guide book priced at 12 yuan for each student in the fourth and fifth grades. It is known that there are 124 students in the fourth grade and 128 students in the fifth grade. How much is the total cost for the two grades?
东林小学要为四、五年级的每个同学购买一本价格是12元的阅读辅导书．已知四年级有124人，五年级有128人，两个年级一共需要多少钱？
<gadget id="calculator">124 + 128</gadget>
<output>252</output>

<gadget id="calculator">12 * 252</gadget>
<output>3_024</output>

<result>3_024</result>