10 % people of a village in sri lanka died by bombardment , 15 % of the remainder left the village on account of fear . if now the population is reduced to 3213 , how much was it in the beginning ?
"x * ( 90 / 100 ) * ( 85 / 100 ) = 3213 x = 4200 answer : b"
floor(divide(3213, multiply(divide(subtract(const_100, 10), const_100), divide(subtract(const_100, 15), const_100))))