When you want to know how somebody has reached a conclusion.. A.So , here's that $40 I owe you? B.How do you get/figure that? A.$20 for the ticket and $20 for the t-shirt. B.Right! I forgot all about the shirt.

A person doesn't understand your thought processes or a way you've found an answer. 3% of £3.37 = £0.99, "How do you get that?" Well 1% is 33p so times that by 3 = 33p. Say my girlfriend never let's me use the internet, "darling why don't you let me use the internet?". "You'll talk to other women", "How do you get that?", "because every other man I've known has cheated on me!". Also literally it means how did you obtain something? I have a ticket to the after party! "How do you get that? I know the organisers! It's either literal or figurative.

For instance, You solved a challenging math problem/or you are a detective and you cracked a case. Your friend do not understand and so he asked "How do you get that?" which means how do you understand/solve the problem? Or maybe you trained so hard and you have those neat chocolate abs and your friend asked "How do you get that (abs)?" It literally means How do you get (as in to understand/solve/know/get & etc) that (something you do/have)? "How do you get that?" can be an exclamation (an exclamatory sentence) like you got yourself a limited edition Thor toy figure and your friend said "Wow! That was so cool! How did you get that!" He or she does not really want to know exactly how you got that. I hope I am correct and I hope this helps :-)