There are 6 classes in the sixth grade of the experimental primary school, each class has 50 students, accounting for (1/6) of the total number of students in the school. The number of students in the fifth grade accounts for 2/9 of the total number of students in the school. How many students are there in the fifth grade?
实验小学六年级有6个班，每班有学生50人，占全校学生总人数的(1/6)．五年级学生人数占全校学生总人数的(2/9)，五年级有学生多少人？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">6 / (1/6)</gadget>
<output>36</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">50 * 36 * (2/9)</gadget>
<output>400</output>

<result>400</result>