There are three classes in the fifth grade in a certain school. The number of students in the first and second classes is equal. The number of students in the third class accounts for 7/22 of the whole grade, and there are 3 students less than the first class. How many students are there in the fifth grade in this school?
某校五年级有三个班，其中一、二班人数相等，三班人数占全年级的(7/22)，而且比一班少3人，求该校五年级共有多少人？
<gadget id="calculator">7 / 22</gadget>
<output>7/22 = around 0.318182</output>

<gadget id="calculator">1 - (7/22)</gadget>
<output>15/22 = around 0.681818</output>

<gadget id="calculator">(15/22) / 2</gadget>
<output>15/44 = around 0.340909</output>

<gadget id="calculator">(15/44) - (7/22)</gadget>
<output>1/44 = around 0.022727</output>

<gadget id="calculator">3 / (1/44)</gadget>
<output>132</output>

<result>132</result>