Papua New Guinea is 16,211 times larger than Caguas, Puerto Rico.
Area: 462,840 km2 World Factbook
Population: 6,552,730 (July 2014) World Factbook
Papua New Guinea, officially the Independent State of Papua New Guinea, is an Oceanian country that occupies the eastern half of the island of New Guinea and its offshore islands in Melanesia, a region of the southwestern Pacific Ocean north of Australia. Wikipedia
Area: 29 km2 calculated
Caguas, founded in 1775, is a city and municipality of Puerto Rico located in the Central Mountain Range of Puerto Rico, south of San Juan and Trujillo Alto, west of Gurabo and San Lorenzo, east of Aguas Buenas, Cidra, and Cayey. Caguas is located 20 miles from San Juan and 40 miles from Ponce. Wikipedia