Last semester, there were 180 students in the sixth grade of Hongguang Primary School. This semester, the number of boys increased by 16%, and the number of girls decreased by 6. This semester, there were 186 students in the whole grade. How many boys were there in the sixth grade last semester?
上学期红光小学六年级共有学生180人，这学期男生人数增加了16%，女生人数减少6人，这学期全年级共有学生186人，上学期六年级有男生有多少人？
<gadget id="calculator">6 - 180</gadget>
<output>-174</output>

<gadget id="calculator">186 + (-174)</gadget>
<output>12</output>

<gadget id="calculator">16 / 100</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">12 / (4/25)</gadget>
<output>75</output>

<result>75</result>