The 30 students can just share some exercise books equally, and then 6 more students came, and everyone redistributed, and each person got 2 less exercise books than before. How many of these exercise books are there?
30个同学正好可以平分一些练习本，后来又来了6人，大家重新分配，每人分得的练习本比原来少了2本．这些练习本共多少本？
<gadget id="calculator">2 * 30</gadget>
<output>60</output>

<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<gadget id="calculator">60 + 12</gadget>
<output>72</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) * 30</gadget>
<output>1</output>

<gadget id="calculator">(1/30) * 6</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) - 1</gadget>
<output>-4/5 = around -0.8</output>

<gadget id="calculator">1 + (-4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">72 / (1/5)</gadget>
<output>360</output>

<result>360</result>