<prompt> Answer this question truthfullyWhat is the Parkland formula used for and how is it calculated?  <response>: <reason> The Parkland formula is used to estimate the total fluid requirement in the first 24 hours for burn victims and is calculated as total fluids 4 mL TBSA x body weight kg, where TBSA is the percentage of total body surface area that is burned and body weight is measured in kilograms. 