100。 The calculation method of interest for 10,000 yuan a month is as follows: interest is equal to principal times interest rate times time, principal is 10000 yuan, interest rate is 1, time is 1 month, and interest is equal to 10000 yuan times 1 month. Interest is the use fee of money in a certain period of time, and it refers to the reward that money holders (creditors) get from borrowers (debtors) for lending money or monetary capital. Including deposit interest, loan interest and interest generated by various bonds.