The number of students who meet the sports standards in Guangang Primary School accounts for 9/10 of the total number of students in the school, which is exactly 450. How many students are there in the school?
官港小学体育达标人数占全校学生总数的(9/10)，正好是450人，全校有学生多少人？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">450 / (9/10)</gadget>
<output>500</output>

<result>500</result>