Convert from petagram to denaro [Italy]

Unit Definition (petagram)
The petagram is a metric unit of mass equal to 10E15 grams or 1 gigatonne (one billion metric tons). This unit is used in atmospheric science and other scientific contexts where large masses are considered.

Unit Definition (denaro [Italy])
The denaro is a traditional Italian weight unit equal to 24 grani; its size varied from about 1.1 grams to 1.25 grams.