To convert milliliters (mL) to liters (L), you can use the conversion factor that 1 L = 1000 mL.
To convert 3200 mL to liters, you divide by 1000:
\[ 3200 , \text{mL} \div 1000 = 3.2 , \text{L} \]
So, 3200 mL is equal to 3.2 L.
The correct answer from your options is 3.2 L.