Students in two grades go to buy books. There are 48 students in the third grade, and each of them buys 2 books. There are 176 students in the fourth grade, and each of them buys 3 books. How many books did the third and fourth grades buy in total?
两个年级的同学去买书，三年级有48人，每人买2本，四年级共176人，每人买3本，三、四年级一共买了多少本？
<gadget id="calculator">48 * 2</gadget>
<output>96</output>

<gadget id="calculator">176 * 3</gadget>
<output>528</output>

<gadget id="calculator">96 + 528</gadget>
<output>624</output>

<result>624</result>