<font size = 9 color = "red"><b>THAT'S NOT THE WAY YOU'RE SUPPOSED TO DO IT!</font>

<pre><font size = 5 color = "indigo"><b>

solver91311 showed you how to do it the way you were
trying it. You can indeed get the answer the way you're 
trying and the way solver91311 showed you, if you don't 
make a mistake.  But you aren't supposed to do it that
way!  Here's the way you're supposed to do it:

{{{(3000)^3}}}

Write {{{3000}}} as {{{3*10^3}}}

{{{(3*10^3)^3}}}

Consider {{{3}}} as {{{3^1}}}

{{{(3^1*10^3)^3}}}

Remove the parentheses by multiplying
the two inner exponents by the outer exponent:

{{{3^(1*3)10^(3*3)}}}

Do the actual multiplying:

{{{3^3*10^9}}}

Since {{{3^3 = 3*3*3 = 27}}}, replace {{{3^3}}} by {{{27}}}

{{{27*10^9}}}

But that is not scientific notation because
{{{27}}} is greater than {{{10}}}, and the first part
of scientific notation must be between {{{1}}} and {{{10}}}, inclusive
of 1 but exclusive of {{{10}}}.  So write {{{27}}} in scientific
notation as {{{2.7*10^1}}}:

{{{2.7*10^1*10^9}}}

Add the exponents of 10

{{{2.7*10^(1+9)}}}

Do the actual addition:

{{{2.7*10^10}}}

Edwin</pre>