Pi raqami, yunon alifbosining π harfi bilan ifodalanadi, birinchi bo'limida 3,1415927 ga teng, ammo aniq qiymatga ega emas, chunki u irrational raqamdir (u ikki butun sonning nisbati sifatida ifodalanishi mumkin emas, ya'ni u ratsional emas va uning o'nli ifoda aniq va davriy emas).
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence