Convert from gros to truss

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

Unit Definition (truss)
The truss is a traditional weight unit, generally equal to 4 stone or 56 pounds (about 25.4 kilograms). The truss was used primarily for measuring hay. In 1795, Parliament specified that a truss of hay should equal 56 pounds for old hay or 60 pounds (about 27.2 kilograms) for new hay.