This operation enables the standard format for real numbers on the calculator. In standard format, a number will appear without an exponent if it can be represented in 12 or fewer digits. If more digits are required for 0's to the left or the right of the decimal point, then exponential format will be used. In exponential format, numbers look like 1.111E13 or 2.222E-12 which means 1.111 x 1013 and 2.222 x 10-12 respectively.