Convert from quartern-loaf to avogram

Unit Definition (quartern-loaf)
The quartern-loaf is a traditional English unit of weight for bread. A quartern-loaf is made from a quartern of flour. The finished loaf usually weighs somewhere between 4 and 5 pounds (very roughly 2 kilograms).

Unit Definition (avogram)
The avogram is a unit of mass, equal to 1 gram divided by the Avogadro number.