`1 Pb = 2^{10} Tb; 1 Tb = 2^{10} Gb; 1 Gb = 2^{10} Mb; 1 Mb = 2^{10} Kb; 1 Kb = 2^{10} Byte; 1 Byte = 8 bit`
`2 Gb=2.2^{10}.2^{10}=2097152 Kb`
`4 Kb=4.2^{10}.8=32768 Bit`
`10 Gb=(10)/(2^{10} . 2^{10})≈0,0000095 Pb`
`7 B=7.8=56 Bit`
`3 Gb=3.2^{10}.2^{10}=3072Mb`