What Is The Largest Two Digit Number. English number words include numerals and various words derived from them, as well as a large number of words borrowed from other languages. 3•3•3•3=81, of you mean starting with 3 and then successively multiplying by 3 until you reach the largest two digit number you can reach this way, then the answer is 81.
Using figures (also called numerals) is largely a matter of writers' preference.
The cardinal numbers (one, two, three, etc.) are adjectives referring to quantity, and the ordinal numbers (first, second, third making the ordinal number plural if the numerator is larger than 1. Again, consistency is the key. Write in consecutive order all the digits. A symbol that represents a number is called a numeral.
