There are 96,979 species of birds that have died out in the long history of the earth, which is 769 species more than 10 times the number of existing birds. How many species of birds are there in existence? (solution by equation)
在地球漫长的历史上已经消亡的鸟类有96979种，比现存鸟类的10倍还多769种，现存鸟类有多少种？(用方程解)
<gadget id="calculator">96_979 - 769</gadget>
<output>96_210</output>

<gadget id="calculator">96_210 / 10</gadget>
<output>9_621</output>

<result>9_621</result>