The school distributes a batch of children's books to the fourth, fifth and sixth grades in a ratio of 3:4:5. Among them, the sixth grade is allocated 32 more books than the fourth grade, so how many books are allocated to the fifth grade?
学校把一批儿童读物按3：4：5的比例分配给四、五、六年级，其中六年级比四年级多分到32本，那么五年级分到多少本？
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<result>64</result>