In addition to the dividend 5% was allowed for commission, office expenses and risk.
At each stage of the division the number of digits in the reduced dividend is decreased by one.
Percentage: Brokerage, commission, discount, dividend, interest, investment, profit and loss.
If all the trade between Russia and Teheran were to pass over this road, the tolls would no doubt pay a fair dividend on the capital, but much of it goes by way of the TeherAnMeshed--i-Sar route, which is much shorter and has no tolls.
Treating x as the unknown quotient corresponding to the original dividend, we obtain successive dividends corresponding to quotients x-200, x- 230 and x-231.