Xiaoming left home for Baoding on September 3rd 10 on business and returned home on September 6th 17. How long has he been away on business?

According to the division method, a day has 24 hours, and there are three days from September 3rd 10: 00 to September 6th 10: 00, that is, 24*3=72 (hours), and from September 6th100 to September 6th1.

Xiao Ming is synonymous with a character. Because this name is born with the temperament of cold jokes, it is famous for telling cold jokes at school, so it has become the protagonist name in many jokes, and often appears in composition, English, mathematics, physics, chemistry and jokes in primary and secondary schools. This name has a very long historical connotation. It appears in all kinds of "masterpieces" of China, which embodies China's rich Chinese civilization. It even once represented China's rush out of Asia to the world and became one of the "most influential names". He took pains to be active in all kinds of applied problems and compositions, and he is the protagonist in primary school textbooks and even in the sea of problems. He jumped around actively on math problems and bullied the students. Xiao Ming, who was born after 70, 80, 90, 00 and 14, occupied most primary school Chinese, math textbooks and even political exercises for 40 or 50 years. Together with Xiaohong and Xiao Qiang, Xiao Ming is also called "the golden iron triangle".