'Calculate' in the Bible
then he shall calculate the years since its sale and refund the balance to the man to whom he sold it, and so return to his property.
He then with his purchaser shall calculate from the year when he sold himself to him up to the year of jubilee; and the price of his sale shall correspond to the number of years. It is like the days of a hired man that he shall be with him.
and if few years remain until the year of jubilee, he shall so calculate with him. In proportion to his years he is to refund the amount for his redemption.
If he consecrates his field after the jubilee, however, then the priest shall calculate the price for him proportionate to the years that are left until the year of jubilee; and it shall be deducted from your valuation.
then the priest shall calculate for him the amount of your valuation up to the year of jubilee; and he shall on that day give your valuation as holy to the Lord.