Dear Ratan,
The widow will receive a monthly pension of Rs. 2051 for life or until her remarriage, in exchange for a monthly salary of Rs. 6500. The children will each receive Rs. 513 until they reach the age of 25. If the widow's pension is discontinued (due to remarriage or death), the child pension will be converted to an orphan pension. In such a scenario, they will receive three times the original pension amount, which amounts to 513 x 3 = 1539 each.
Regards,
Abbas.P.S