To convert 20 liters to centiliters (cl), we use the fact that 1 liter equals 100 centiliters. Thus:
\[ 20 \text{ liters} = 20 \times 100 \text{ cl} = 2000 \text{ cl} \]
Next, we need to find out how many 200 cl units are in 2000 cl:
\[ \frac{2000 \text{ cl}}{200 \text{ cl}} = 10 \]
So, you can see 10 200 cl in 20 liters.