In the fifth grade of Yucai Primary School, there are 68 boys and 72 girls. The number of students in the fifth grade is that of the sixth grade (7/9). How many students are there in the sixth grade?
育才小学五年级有男生68人，女生72人．五年级的学生人数是六年级的(7/9)，六年级有学生多少人？
<gadget id="calculator">68 + 72</gadget>
<output>140</output>

<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">140 / (7/9)</gadget>
<output>180</output>

<result>180</result>