10 % people of a village in sri lanka died by bombardment , 20 % of the remainder left the village on account of fear . if now the population is reduced to 3240 , how much was it in the beginning ?
"x * ( 90 / 100 ) * ( 80 / 100 ) = 3240 x = 4500 answer : d"
floor(divide(3240, multiply(divide(subtract(const_100, 10), const_100), divide(subtract(const_100, 20), const_100))))