Question: who has the largest prison system in the world
Answer: ) 349 Qatar 53 Republic of ( South ) Korea 107 Republic of Guinea 26 Reunion ( France ) 120 Romania 142 Russian Federation 450 Rwanda 434 Samoa ( formerly Western Samoa ) 258 Sao Tome e Principe 87 Saudi Arabia 161 Senegal 62 Serbia 142 Seychelles 799 .