I turned on the tap so that 21 liters (L) came out in 6 minutes to fill the bathtub. When I filled the water without blocking the water drain in the bathtub, it took 22 minutes and 30 seconds to fill it up. If 0.3 liters (L) of water escaped from the bathtub per 1 minute, find how many liters (L) the bathtub can contain.
21 6 [OP_DIV] 0.3 [OP_SUB] 22 30 60 [OP_DIV] [OP_ADD] [OP_MUL]
var_a = 21
var_b = 6
var_c = var_a / var_b
var_d = 0.3
var_e = var_c - var_d
var_f = 22
var_g = 30
var_h = 60
var_i = var_g / var_h
var_j = var_f + var_i
var_k = var_e * var_j
print(int(var_k))