Power Supply ..chossing caps and control voltage..

yeah I appreciate it though , one more question

24 / 5 = 4.8. Use a 56k/10k resistor to get a 5.6 divider

what does the 4.8 mean ? and how did you find those values so fast? i usually have to look at how much my input is, say 24v and then how much output i want say 6volts and then figure out what percentage 6volts is of 24volts , which is 25% then i know one of my resistors has to be 25% of R1 + R2 .... hehe probably over complicating that as well :confused: