Loan taken from banks and Fixed deposit scenerios

Dear experts,

Please guide me, i have two Scenarios,

1. My client have fixed deposits in bank - how to configure in sap

2. loan taken from bank - when i repayment the loan amount it should deducted from my loan principle amont in the this process what is role of my house banks. what entries should make, how to calculate interest on loan -- how to configure this Scenario in sap

please guide me

Regards

Chandu