How to express the number1September 23, 987 in Roman numerals?

I IX seven. Nine. XXIII 1987. 09。 23

Roman numerals have only seven symbols: I (for 1), V (for 5), X (for 10), L (for 50) and C (for 100), D (for 500) and M (for/kloc-0). No matter how the positions of these seven symbols change, the numbers they represent are the same. They can be combined to represent any number according to the following laws:

1. Repetition: How many times the Roman numeral symbol is repeated means several times this number. For example, "three" means "3"; XXX stands for "30".

2. Add right and subtract left: the symbol representing big numbers is attached to the right of the symbol representing small numbers, which means that big numbers are added to small numbers, such as "VI" for "6" and "DC" for "600". On the left of the symbol representing big numbers, there is a symbol representing small numbers, which means that the number of big numbers minus small numbers, such as "IV" for "4", "XL" for "40" and "VD" for "495".

3. Add a horizontal line: add a horizontal line to the Roman numeral, indicating that it is 1000 times the number. This is the writing and law of Roman numerals ~ you can write it like this