A gross was a counting unit equal to a dozen dozen or 144.
After living together a short time in 2265, Ben Childress quickly grew tired of Eve McHuron, describing her as homely, and bragging that he's is in possession of enough dilithium crystals "to buy queens by the gross!" (TOS: "Mudd's Women")
In 2369, Jake Sisko and Nog traded five thousand wrappages of Cardassian yamok sauce for one hundred gross self-sealing stem bolts, in an exchange with a Lissepian freighter captain. The 14,400 stem bolts were, in turn, traded for seven tessipates of land on Bajor. (DS9: "Progress")
In 2371, Quark had his own supply of one hundred gross of self-sealing stem bolts occupying space in Cargo Bay 11. He offered them to a wealthy prospective buyer named Emi for ten bars of gold-pressed latinum. Emi was, however, later told by Grand Nagus Zek where she could get the same quantity of bolts at wholesale, for a much-reduced price. (DS9: "Prophet Motive")