The American naming seems to follow a logical pattern. 1000 times one thousand = one million, one thousand times a million is a billion, 1000 times a billion is a trillion, 1000 times a trillion is a quadrilion = 10E15.
Are you saying a million times a million is called a billion in Austraila? A billion times a billion 10E24 is called a trillion in Austraila? A trillion times a trillion is called a quadrillion = 10E48 in Austraila? That is also a logical pattern. Neil