human
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?
assistant
How many mL are in 20 bottles of oil? ** Twenty bottles of oil is equal to 200 mL x 20 = <<20*200=4000>>4000 mL.
How many liters of oil did the store owner have? ** Since 1 liter is equal to 1000 mL, then the store owner had 4000/1000 = <<4000/1000=4>>4 liters of oil.
#### 4