Calculate the number 2878

A woman is picked up by Dennis Rodman in a bar. They like each other and she goes back with him to his hotel room. He removes his shirt revealing all his tattoos and she sees that on his arm is one which reads, "Reebok". She thinks that's a bit odd and asks him about it. Dennis says, "When I play basketball, the cameras pick up the tattoo and Reebok pays me for advertisement."

A bit later, his pants are off and she sees "Puma" tattooed on his leg. He gives the same explanation for the unusual tattoo. Finally, the underwear comes off and she sees the word "AIDS" tattooed on his penis. She jumps back with shock..

"I'm not going to do it with a guy who has AIDS!"

He says, "It's cool baby, in a minute it's going to say "ADIDAS".