Hyunwoo's family uses 215 liters (L) of water a day. If they adjust the water pressure valve weakly, they can save as much as 0.32 times the usual amount. How many liters (L) of water can Hyunwoo's family save in a day when the water pressure valve is adjusted weakly?
215 0.32 [OP_MUL]
var_a = 215
var_b = 0.32
var_c = var_a * var_b
print('{:.2f}'.format(round(var_c+1e-10,2)))