How do you write 7790 in a roman numeral?

Answer 1

Some of these letters need a horizontal line over them. It means you times the letter by 1,000. Since I can't do this here, a "*" before a letter will represent the horizontal line. 7790=*V*I*IDCCXC

Answer 2

7790 cannot be written in Roman numerals because the Roman numeral system does not have representation for numbers in the thousands.