360 yuan. There are 12 months in a year, and a month is 30 days. In mathematical operations, 24 months is 720 days. When there is a situation of 50 cents a day, it only takes 720 days, and x5 cents is equal to 360 yuan. Mathematics is a discipline that studies the concepts of quantity, structure, change, space and information, and belongs to a formal science from a certain point of view.