A store owner repacked his oils into 200 mL bottles. He was able to make 20 bottles. How many liters of oil did the store owner have?
Twenty bottles of oil is equal to 200 mL x 20 = 
<gadget id="calculator">20*200</gadget>
<output>4_000</output>
4000 mL.
Since 1 liter is equal to 1000 mL, then the store owner had 4000/1000 = 
<gadget id="calculator">4000/1000</gadget>
<output>4</output>
4 liters of oil.

<result>4</result>