In the sixth grade of a certain elementary school, 18 boys and 12 girls are selected to participate in the mathematics competition. The number of remaining boys is 1.1 times the number of remaining girls. It is known that there are 261 sixth grade students in this school. How many boys are there in this grade? people?
某小学六年级选出18名男生的和12名女生参加数学竞赛，剩下的男生人数是剩下的女生人数的1.1倍，已知这个学校六年级学生共有261人，则这个年级有男生多少人？
<gadget id="calculator">261 - 12 - 18</gadget>
<output>231</output>

<gadget id="calculator">1 + 1.1</gadget>
<output>2.1</output>

<gadget id="calculator">231 / 2.1</gadget>
<output>110</output>

<gadget id="calculator">1.1 * 110</gadget>
<output>121</output>

<gadget id="calculator">121 + 18</gadget>
<output>139</output>

<result>139</result>