There are 180 students in the sixth grade, and there are 15 more students in the sixth grade than in the fifth grade (5/9). How many students are there in the fifth grade?
六年级有学生180人，六年级比五年级的(5/9)还多15人，五年级有多少人？
<gadget id="calculator">180 - 15</gadget>
<output>165</output>

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

<gadget id="calculator">165 / (5/9)</gadget>
<output>297</output>

<result>297</result>