There are 15 computer enthusiasts in Class 1, accounting for (1/3) of the students in the whole class, and the number of Class 1 in Class 1 is 1/3 of the total number of students in the whole grade. How many students are there in Grade 6?
六1班有电脑爱好者15人，占全班学生数的(1/3)，六1班的人数又是全年级人数的(1/3)，六年级共有多少学生？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">15 / (1/3) / (1/3)</gadget>
<output>135</output>

<result>135</result>