The largest roman number is 'M' which stands for a thousand.
So 1,000,000,000 (one billion/milliard) would be written as a million M's.
In the Middle Ages a horizontal line above the roman numbers was used to multiply with thousand. So then you would only need a thousand M's with a line above them.
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( ( M ) )
m
The same as: 1.0*109 seconds
I am assuming you mean what's the SI prefix for measurements in the trillions. 1 trillion = 1000 billion = 1000000 thousand = 1000000000 = 10 ^ 9 You can search online fairly easily to figure out: 1000 = 10 ^3 symbol: k 1000000 = 10 ^ 6 symbol: M (mega) 1000000000 = 10 ^ 9 symbol: G (giga) Also, Megatron is actually 1000000tron
3.857142857 in fraction form = 3857142857/1000000000 3.857142857 * 1000000000/1000000000 = 3857142857/1000000000