The school bought 4 boxes of books, 180 books in each box, and distributed them to 6 grades on average. How many books were distributed to each grade?
学校买来4箱图书，每箱180本，平均分给6个年级，每个年级分得多少本？
<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">180 * (2/3)</gadget>
<output>120</output>

<result>120</result>