How many milliliter is there in 3 and a half liters?

There are 3,500 milliliters in 3 and a half liters. This is because there are 1,000 milliliters in 1 liter, so to convert liters to milliliters, you would multiply the number of liters by 1,000. Therefore, 3.5 liters x 1,000 milliliters per liter = 3,500 milliliters.