There are 25 boys in class one of six years, accounting for 5/9 of the whole class. How many students are there in the whole class?
六年一班有男生25人，占全班人数的(5/9)，全班共有学生多少人？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">25 / (5/9)</gadget>
<output>45</output>

<result>45</result>