Dynamic action issue

Hi Experts,

I have below requirement in dynamic action where i need to write logic in IT0041

there is date type NO - retirement date where retirement date should calculate automatically while doing the hiring process

it has to check the DOB in IT0002 and multiply no of years and age should be 60 from the DOB the same thing need to be incorporate while doing the hiring process.

please give us solution to write a dynamic action

Regards,

Prasath