The display reading of 1.78E12 indicates that the calculator is utilizing scientific notation to express a very large number. In this notation, "E" signifies "exponent" and serves as a shorthand for "multiplied by ten raised to the power of."
In this instance, 1.78E12 signifies:
To convert this to standard form, you multiply 1.78 by 10 raised to 12. This requires shifting the decimal point in 1.78 twelve places to the right.
Therefore, in standard notation, 1.78E12 is:
This corresponds to the number 1 trillion 780 billion. Essentially, Charlee's calculator is indicating that the product of the two large numbers equals 1.78 trillion.