How is the exchange rate calculated? Thank god, help me.

Calculated according to the foreign exchange quotation published by the bank. China implements the indirect pricing method which is rare in the foreign exchange market, that is, 100 foreign currency =XXX RMB (for example, 100 USD =660.32 RMB, abbreviated as 1 USD = 6.6 RMB). For example, if it is a dollar bill, there are two quotations, one is the cash purchase price (the bank will buy your dollar at the purchase price). If you want to buy $65,438+000 in cash from the bank, the exchange rate is $65,438+0 = the quotation of RMB in 6.6 yuan. Give 660 yuan RMB to the bank, and you can change it into 100 USD notes. Similarly, if you give the bank 66,032 yuan, you can change it into 100 dollars 10000 yuan notes (10000 dollars in cash).