Answer:
6646.6
Explanation:
You want the antilog of 3.8226.
Antilog
A scientific or graphing calculator, or any spreadsheet can tell you the value of 10 to that power, assuming this is a common log.
10^3.8226 ≈ 6646.6
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Additional comment
If this is a natural log, then the base is e ≈ 2.718281828459045... instead of 10.
Most calculators have keys dedicated to the antilog functions. (Antilog may be a "2nd" or "Shift" function of a logarithm key.)