File size: 3,79 MB (3.981.366 bytes)

Formula used: Width(1536 pixels)*height(864 pixels)*bit depth(24 bits)= 31.850.496bits/8=3.982.312Bytes/1024=3888KB/1024=3,79MB

File size: 170KB

Compression ratio: 3888KB/170KB=22,87-->23 times bigger the bmp file than the jpg file.