There are more than 3.78 deciliters of water in the bottle because 1 liter is equal to 10 deciliters, making a total of 37.8 deciliters for 3.78 liters.
The question is asking us to compare two different units of volume: liters and deciliters. To answer the question, we need to be aware of the relationship between these two units. Specifically, 1 liter is equal to 10 deciliters. So, if we have 3.78 liters of water, without even calculating, we can determine that there are more than 3.78 deciliters of water in the bottle since each liter is comprised of 10 deciliters. Therefore, there would actually be 3.78 liters imes 10 deciliters/liter = 37.8 deciliters of water in the bottle.