In the long scale, it's like this: 10^3 = thousand 10^6 = million 10^9 = milliard 10^12 = billion 10^15 = billiard 10^18 = trillion So there are 10^18/10^6 = 1

In the long scale, it's like this: 10^3 = thousand 10^6 = million 10^9 = milliard 10^12 = billion 10^15 = billiard 10^18 = trillion So there are 10^18/10^6 = 10^12 millions in a trillion. In the long scale, they'd call that a billion. So the two correct answers are "there are a million millions in a trillion" and "there are a billion millions in a trillion"