There are 120 students in the sixth grade. The ratio of male to female students is 7:5. Girls account for the number of sixth grade students ((())/(())). How many boys are there?
六年级有120人，男女生人数比是7：5，女生占六年级学生人数的((())/(()))，男生有多少人．
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

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

<gadget id="calculator">120 * (7/12)</gadget>
<output>70</output>

<result>70</result>