The number of students in the experimental primary school (2/9) is 400, how many students are there in the experimental primary school?
实验小学全校学生人数的(2/9)是400人，实验小学共有学生多少人．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">400 / (2/9)</gadget>
<output>1_800</output>

<result>1_800</result>