milligram is the milli- prefix (m) to the gram unit (g); it is written as mg.
eg 5 milligrams is 5 mg.
1 mg
You would write it as 22,000,000,000,000.
You would write it as "2 hours"
Today we would write it out as XLV
You would write $5,030
1 mg
0.06 mg
23 mg.
You can write two-tenths of a milligram as 0.2 mg.
You would write it as 22,000,000,000,000.
I would write it like this 5,000,000.
You would write it as "2 hours"
Today we would write it out as XLV
318
1 mg
In numbers, 313.9 million would be 313,900,000.
In the same way as you would write any integer.