To convert liters to milliliters, you need to know that 1 liter is equal to 1,000 milliliters. Therefore, to convert 4 liters into milliliters, you simply multiply the number of liters by 1,000.
In this case, you would calculate:
4 liters × 1,000 milliliters/liter = 4,000 milliliters
This means that 4 liters is equal to 4,000 milliliters. It’s a straightforward conversion once you remember the relationship between liters and milliliters!