Pune in India
The answer is "Post Office". The word"Post" starts with "P", the word "Office" ends with "E". There are 10 letters in the word, but there are millions of letters in the place, Post Office.
Roman numerals use letters in place of numbers. An unknown variable in algebra uses a letter instead of a number.
The battle of APACHE Canyon
Algebra uses variables to represent the unknown numeral.
A factory is a place where goods are made.