I can give you an example. Let at the time of entry your age is 30 yrs. Maturity age is 60 i.e. term of policy is 30 yrs. S.A.= Rs. 5,00,000. Then the calculation of maturity value is like below.
Maturity value=Rs.(5,00,000+30x6500x5) =Rs.(5,00,000+9,75,000)=Rs. 14,75,000 only, according to the present rate.