Formula: loan amount = monthly repayment amount *[ 1-( 1+ monthly interest rate)-repayment months]/monthly interest rate.

12000 =1360 * [1-(1+monthly interest rate)-12]/ monthly interest rate.

Monthly interest rate =5.07973%

Annual interest rate =60.95679%

Belong to "usury". ?

2. What should I do if I don't repay according to the "equal principal and interest" repayment method?

Annual interest rate = (1360 *12-12000)/112000 *100%.

Annual interest rate =36%

The annual interest rate is also higher than 24%, which is unreasonable.

No matter what kind of interest rate calculation method, it is beyond the reasonable range.