There are 300 books, which are allocated to three classes according to the ratio of 3:2:1. How many books are assigned to the class with the most books in the midterm.
有300本图书，按3：2：1的比例分配给三个班，期中最多的一个班分到多少本．
<gadget id="calculator">3 + 2 + 1</gadget>
<output>6</output>

<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">300 * (1/2)</gadget>
<output>150</output>

<result>150</result>