While the au program, "multizg", performs n times "zg" accumulations,
this "multigo" au program performs N loop accumulations of
n times accumulations. => start Exp(1) to Exp(n) with "zg"
(this is exactly same as "multizg"),
and after finishing 1st Exp(n), back to Exp(1) and start accumulation
with "go" to Exp(n) repeating by N-1 times.