Computing question

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Some guy wants to make some copies of photographs. He intends to use a scanner to capture the photographs and an ink jet printer to print the images.

A scanner i set to a resolution of 1200dpi using 24 bit colour depth and the photographs are 6 inches by 8 inches. Calculate the uncompressed size of the file. Express your answer in appropriate units.​



The answer is supposed to be 197.8 MB but I'm struggling to work out how you'd get there.

I was thinking it was something like 1200 * (6*8) * 24

then dividing by 8 and then 1024 and 1024 again to get it in MBs, but I don't get the 197.8 MBs that's in the answers.

I know I'm missing something simple out so any help much appreciated :s
 
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