Alternately, the speed of light is equal to 1 gigabertie. (The tortoise's name is Bertie.)
The world's fastest tortoise can go 0.28 m/s, which is equal to 1e-9 * c, or "one nanolight":
https://www.guinnessworldrecords.com/world-records/77951-fastest-tortoise
"Is Hermione Granger a catgirl," the greatest thread in the history of forums, locked by admins after 12,239 pages of heated debate
https://en.wikipedia.org/wiki/Talk:List_of_catgirls#RfC:_is_Hermione_Granger_a_catgirl%3f