There are 200 boys in the sixth grade and 160 girls in the school. The number of students in the fourth grade is 75% of that in the sixth grade. How many students are there in the fourth grade?
学校六年级有男生200人，女生160人，四年级学生人数是六年级的75%，四年级有学生多少人？
<gadget id="calculator">200 + 160</gadget>
<output>360</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">360 * (3/4)</gadget>
<output>270</output>

<result>270</result>