 So, this is probably one of the more difficult temperature conversion problems that you can do, but I guess useful if you've only got a Fahrenheit thermometer available to you. So, if you only have a Fahrenheit thermometer, you're going to have to, if you want to convert to Kelvin, you're going to have to remember two formulas. So, the formula from Fahrenheit to Celsius are degrees Fahrenheit, or Celsius to Fahrenheit, sorry. That's the one I remember. We'll also have to remember the Kelvin one. So, degrees Celsius plus 273. Equation to get this formula, degrees Celsius equals Celsius first, and then go ahead and convert it to Kelvin, divided by one point equals negative 20 boxes. And I'm just going to leave that number in my calculator and then add that, and you would expect it to be 273. You should have expected that to be less than 273.15. Why? Because that's a negative number, right? So, you'd have to, again, remember, you like to memorize stuff. Okay, cool. We'll go from Kelvin