A total of 100 teachers and students from Renmin Road Primary School planted trees. Each teacher planted 3 trees, and every 3 students planted 1 tree on average. A total of 100 trees were planted. So, how many students participated in tree planting?
人民路小学的教师和学生共100人去植树，教师每人栽3棵树，学生平均每3个人栽1棵，一共栽100棵．那么，有多少名学生参加植树？
<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<gadget id="calculator">300 - 100</gadget>
<output>200</output>

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

<gadget id="calculator">3 - (1/3)</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">200 / (8/3)</gadget>
<output>75</output>

<result>75</result>