We would all start speaking math.
Twelve is twelve, PERIOD
Math uses letters to indicate that specific numbers are not known or as an abbreviation for certain constant.
Satan put letters in math during the time period in which the emancipation proclamation was being signed
dozen
To write twelve million twelve thousand twelve, you would start with the numerical value of 12,000,012. This can be broken down as follows: 12 million (12,000,000) + 12 thousand (12,000) + 12 (12). When written out in words, it would be "Twelve million twelve thousand twelve."
In ordinary everyday letters . . . pi In Greek letters . . . Π
Trig
Variables
24
Letters used in math are called variables.
Arithmetic