There are 180 students in the fifth grade, the number of fifth grade is less than the number of sixth grade (1/10), how many students are there in sixth grade?
五年级有学生180人，五年级的人数比六年级的人数少(1/10)，六年级有多少人？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">180 / (9/10)</gadget>
<output>200</output>

<result>200</result>