There are a total of 265 species of birds, 33 species of second-level protected birds, 5 species more than four times the number of first-level protected birds, how many species of first-level birds?
共有鸟类265种，二级保护鸟类33种，比一级保护鸟类的4倍多5种，有一级鸟多少种？
<gadget id="calculator">33 - 5</gadget>
<output>28</output>

<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<result>7</result>