There are 25 boys in the sixth grade and 15 girls in the school. The number of students in the fourth grade is 7/8 of the number of students in the sixth grade. How many students are there in the fourth grade?
学校六年级有男生25人，女生15人，四年级学生人数是六年级人数的(7/8)，四年级有学生多少人？
<gadget id="calculator">25 + 15</gadget>
<output>40</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">40 * (7/8)</gadget>
<output>35</output>

<result>35</result>