Guangming Primary School has a total of 650 students. The number of second-grade students is 20% of the total number of students in the school. The ratio of the number of boys to girls in the second grade is 7:6. How many girls are there in the second grade?
光明小学共有学生650，二年级学生数是全校学生总数的20%，二年级的男生人数与女生人数的比是7：6，二年级有女生多少人？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6 + 7</gadget>
<output>13</output>

<gadget id="calculator">6 / 13</gadget>
<output>6/13 = around 0.461538</output>

<gadget id="calculator">650 * (1/5) * (6/13)</gadget>
<output>60</output>

<result>60</result>