The pound is the standard unit of currency in Britain and is issued by the Bank of England. Auxiliary city units were originally ten shillings and pence, 1 pound = 20 shillings, 1 shilling = 12 pence. Take the Middle Ages as an example: William I (conqueror, Grand Duke William of Normandy), as a king, earned as much as 17650 a year in big noble. At that time, the annual income of the largest feudal aristocrat was only 65,438+0,750 pounds, only 65,438+0/65,438+00 of that of the king. Find another social era: according to the per capita income of the total population, the per capita income of Britain in 1700 was about 8-9 pounds per year, and it increased to 12- 13 pounds in 50 years, and increased to 22 pounds in 1800 (although industrialization began, But there were still many farmers in that era ...) For example: eg1.18th century, the philosopher Becquerel (the person who proposed that existence was perceived) earned less than 100 pounds as a university teacher, including salary and living and work allowance. Eg2。 The famous Adam Smith once visited Duke Bucklow as a mentor, with an annual salary of 300 pounds, plus all the expenses for traveling abroad. 1778 65438+ 10, Smith was appointed as Commissioner of Scottish Customs and Commissioner of Salt Affairs with an annual salary of 500 and 100 respectively. With an annual income of 900 pounds (excluding manuscript fees), you can live a luxurious life.