Passage: Serchhip District is one of the eight districts of Mizoram state in India. The district occupies an area of 1421.60 km². Serchhip town is the administrative headquarters of the district. This district came into existence on 15 September 1998, being carved out of the larger Aizawl District. Because of the way it was created it includes part of East Lungdar Tehsil and part of Thingsulthliah Tehsil.As of 2011 census, it has the highest literacy rate in India, and is the second least populous district of Mizoram (out of 8), after Siaha.

Question: what is the area of the district?
1421.60 km²