Last semester, there were 192 students in the sixth grade of Xinhua Primary School. This semester, the number of girls increased by 15%, and the number of boys decreased by 6. There are 198 students in the whole grade this semester. How many girls were there in the sixth grade last semester?
上学期新华小学六年级共有学生192人，这学期女生人数增加了15%男生人数减少了6人，这学期全年级共有学生198人．上学期六年级有女生多少人？
<gadget id="calculator">6 - 192</gadget>
<output>-186</output>

<gadget id="calculator">198 + (-186)</gadget>
<output>12</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">12 / (3/20)</gadget>
<output>80</output>

<result>80</result>