Saki doesn't understand why she was taken to play mahjong but that's where Saki and Nodoka met. Nodoka wins but questions Saki's playing style so she asks for another game.
You just figured that out now?
هل اكتشفتِ ذلك الآن؟
¿Apenas te das cuenta?
Tu comprends ça 
que maintenant ?
Ci sei arrivata ora?
Só agora você foi perceber?