A water tank has 13/4 liters (L) of water. You remove 12/5 liters (L) of water from the tank and then add back 11/6 liters (L) of water. Calculate the remaining amount of water in the tank in liters (L).
13/4 12/5 [OP_SUB] 11/6 [OP_ADD]
var_a = 3.25
var_b = 2.4
var_c = var_a - var_b
var_d = 1.8333333333333333
var_e = var_c + var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))