40 would usually be written as XL (fifty minus ten)
Ah, painting with Roman numerals, what a happy little challenge! To write forty five in Roman numerals, we combine the symbols for fifty (L) and ten (X) like this: XLV. Just imagine those numerals as little brushstrokes on your canvas, creating a beautiful masterpiece of numbers.
$40.00
1,000,040
10040
3040
47,000
40,000
$45000000
400,044.00
40,089
43,002
6,040,000