Convert from gros to pud, pood [Russia]

Unit Definition (gros)
The gros is a traditional French weight unit equal to 3 deniers (about 3.824 grams).

Unit Definition (pud, pood [Russia])
The pud or pood is a traditional unit of weight in Russia. The pud equals 40 funte or 1/30 packen; this is about 16.381 kilograms or 36.11 pounds. The plural is pudi.