How did prophet Muhammad write the Qur'an?

Muhammad was the prophet and founder of Islam. Most of his early life was spent as a merchant. At age 40, he began to have revelations from Allah that became the basis for the Koran and the foundation of Islam. By 630 he had unified most of Arabia under a single religion. Prophet Muhammad did not write the Quran. Quran is a real God revelation to the prophet Muhammad (PBUH) through the angel Gabriel. Refer to related questions for more information.