One hectoliter (hL) is equivalent to 100 liters (L). One liter (L) is equivalent to 1,000 milliliters (mL). Therefore, we can say that 1 hL is equivalent to 100,000 mL. The problem provides that one mL is equal to 0.034 fluid ounces. Then, we can conclude that 1 hL is equivalent to 3,400 fluid ounces.