Complex sentence: Portugal is divided into 18 districts (Portuguese: "distritos") and 2 autonomous regions (Portuguese: regiões autónomas), Azores and Madeira, that are further sub-divided into 308 municipalities (Portuguese: "municípios" or "concelhos").
Split into simpler sentences: Portugal is divided into 18 districts (Portuguese: "distritos") and 2 autonomous regions (Portuguese: regiões autónomas), Azores and Madeira. The districts and autonomous regions are further sub-divided into 308 municipalities (Portuguese: "municípios" or "concelhos").