Frankly, you're supposed to know by now that
1 liter is the same as 1,000 milliliters.
2 liters = 2,000 milliliters
3 liters = 3,000 milliliters
4 liters = 4,000 milliliters
5 liters = 5,000 milliliters
6 liters = 6,000 milliliters
7 liters = 7,000 milliliters
70 liters = 70,000 milliliters
700 liters = 700,000 milliliters