There are 371 students in the fifth and sixth grades of the experimental primary school. The fifth grade selected 11 people to participate in the writing competition, and the ratio of the remaining number to the sixth grade was 1:2. How many people were there in the fifth grade?
实验小学五六两个年级共有371人．五年级抽调11人去参加书写比赛，剩下的人数与六年级的人数比是1：2．五年级原来有多少人？
<gadget id="calculator">371 - 11</gadget>
<output>360</output>

<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">360 * (1/3)</gadget>
<output>120</output>

<gadget id="calculator">120 + 11</gadget>
<output>131</output>

<result>131</result>