Jongkook drinks milk every day. He drank 3 liters (L) and 7 milliliters (㎖) on the first day, a few milliliters (㎖) on the second day, and 840 milliliters (㎖) on the third day. As he drank 6 liters (L) and 30 milliliters (㎖) in total, how many milliliters (㎖) of milk did Jongkook drink on the second day?
6 1000 [OP_MUL] 30 [OP_ADD] 840 [OP_SUB] 3 1000 [OP_MUL] 7 [OP_ADD] [OP_SUB]
var_a = 6
var_b = 1000
var_c = var_a * var_b
var_d = 30
var_e = var_c + var_d
var_f = 840
var_g = var_e - var_f
var_h = 3
var_i = 1000
var_j = var_h * var_i
var_k = 7
var_l = var_j + var_k
var_m = var_g - var_l
print(int(var_m))