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Shaquisha,

The result you are reading is correct.  The confusion is simply a matter of notation.  The example you gave, 0.21 / 1600 results in 0.00013125.  The reading you saw is simply a shorthand for this.  (number)E(number) is a shorthand for scientific notation, so 1.3125E-4 is also 1.3125x10^(-4), or 0.00013125.  This is not to be confused with "e" as in e^(x), or euler's number.

Hope this helps,

Jeff