Question 572920
You need to be pretty good with exponents to do this problem. 

First let's write the problem in equation form:
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{{{n=3n^(1/3)}}}
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Divide both sides by {{{n^(1/3)}}}
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{{{n^1/n^(1/3)=3}}}
use the exponent power rule to 1-1/3=2/3
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{{{n^(2/3)=3}}}
Take both sides to the 3/2 power
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{{{n=3^(3/2)}}}
simplify this:
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{{{n=sqrt(27)}}}

And to check, {{{3*(27^(1/2))^(1/3)}}} =~5.196 and {{{sqrt(27)}}}=~5.196

because both equal {{{3*sqrt(3)}}}