The shop owner had arranged 21.52 liters (L) of milk, but only 12.64 liters (L) were sold. Find the amount of liters (L) of the remaining milk.
21.52 12.64 [OP_SUB]
var_a = 21.52
var_b = 12.64
var_c = var_a - var_b
print('{:.2f}'.format(round(var_c+1e-10,2)))