During the experiment, Hyungjun threw away 200 milliliters (ml) of the liquid from the beaker and added 1000 milliliters (ml) of the new liquid. If the current solution in the beaker is 2000 milliliters (ml), find the amount of the solution in milliliters (ml) that was initially contained in the beaker.
2000 1000 [OP_SUB] 200 [OP_ADD]
var_a = 2000
var_b = 1000
var_c = var_a - var_b
var_d = 200
var_e = var_c + var_d
print(int(var_e))