Just multiply all numbers to get the total number of bits:
25*50*12 = 15000 bits.
This isn't school related but I'm still gonna help you so you should check the location to see if it's set to be in China if it isn't change it to China if that doesn't work I would just recommend calling customer service if you can.
Just a guess, maybe you’ve been reported for having an incorrect answer two times? I’m really not sure I’m just trying to give out possibilities. Maybe if your a Brainly Helper you haven’t been active so they are giving you warnings? Does clicking on the warning tell you the reason for them? Maybe the system thinks your a robot? I’m not sure just trying to give possible reasons, but you could try contacting customer support, but they aren’t always the quickest at responding.
Have a good day!