The school bought 6 boxes of books, 50 books in each box, and distributed them to 4 grades on average. How many books are distributed to each grade?
学校买来6箱图书，每箱50本，平均分给4个年级，每个年级分多少本？
<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">50 * (3/2)</gadget>
<output>75</output>

<result>75</result>