Class Six 1 has 27 girls and 28 boys. The number of Class Six 1 accounts for 5/9 of the total number of students in the whole grade. How many students are there in the whole grade of Grade Six?
六1班有女生27人，男生28人，六1班人数占全年级学生总人数的(5/9)，六年级全年级有学生多少人？
<gadget id="calculator">27 + 28</gadget>
<output>55</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">55 / (5/9)</gadget>
<output>99</output>

<result>99</result>