There are 180 students in the fifth grade of Dongfeng Primary School, which is 1/8 more than that in the sixth grade. How many students are there in the sixth grade?
东风小学五年级有学生180人，比六年级人数多(1/8)，六年级有多少人？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 + (1/8)</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">180 / (9/8)</gadget>
<output>160</output>

<result>160</result>