Giga = 109 ie a billion

Giga-tronics Incorporated (GIGA) had its IPO in 1983.

As of July 2014, the market cap for Giga-tronics Incorporated (GIGA) is $10,258,869.06.

there is one Giga Giga watt in one Exa watt. So one Exa watt = one Giga Giga watt or 109 Giga watt

or

one Exa watt = 1018 watt and one Giga watt = 109 watt

then

one Exa watt = 109 Giga watt

or

one Exa watt = one billion Giga watt = one thousand million Giga watt

In math, there are 9 zeros in giga. Giga is part of the SI prefixes. Giga symbol is G. If giga were money it would means you have one billion dollars.