Many calculators could present very small and very large results in scientific notation. But how to display exponents like 107 is difficult. So the letter e or E is used to represent times ten raised to the power of; When you see "aEb", it indicates a value of a × 10b.
For example, Enter a number 12345678, the E notation is 1.2345678e+7 and equals to 1.2345678 × 107.