There were originally two classes in the first grade of a certain school, but now they have to be reorganized into three classes. Form a new class with (1/3) of the original number of people in the first class and (1/4) of the original number of the second class; The new second class; the remaining 30 people form the new third class. How many students are there in the new class 1 and the new class 2?
某校一年级原有两个班，现在要重新编为三个班．将原一班人数的(1/3)与原二班人数的(1/4)组成新一班；将原一班人数的(1/4)与原二班人数的(1/3)组成新二班；余下的30人组成新三班．新一班与新二班共有学生多少人？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) + (1/3)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">1 - (7/12)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">30 / (5/12)</gadget>
<output>72</output>

<gadget id="calculator">72 - 30</gadget>
<output>42</output>

<result>42</result>