 The mass translation movement in the ninth century allowed for the integration of science into the Islamic world.A number of modern scholars such as Fielding H. Garrison, Sultan Bashir Mahmood, Hossein Nasr consider modern science and the scientific method to have been greatly inspired by Muslim scientists who introduced a modern empirical, experimental and quantitative approach to scientific inquiry.Certain advances made by medieval Muslim astronomers, geographers and mathematicians were motivated by problems presented in Islamic scripture, such as Al-Khwarizmi's (c. 780–850) development of algebra in order to solve the Islamic inheritance laws, and developments in astronomy, geography, spherical geometry and spherical trigonometry in order to determine the direction of the Qibla, the times of Salah prayers, and the dates of the Islamic calendar.