The school books are distributed to the fifth and sixth grades on average, and each grade gets 120 books. If the books are distributed to the fifth and sixth grades according to 5:7, how many books can the sixth grade get.
学校的图书，平均分给五、六年级，每个年级分得120本，如果按5：7分给五、六两个年级，六年级可分得多少本．
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">120 * 2 * (7/12)</gadget>
<output>140</output>

<result>140</result>