Answer
$6.76\times 10^{-26}dm^3$
Work Step by Step
We know that
$1A=10^{-10}m$
and $1m=10dm$
$\implies 67.6 A^{3}=67.6\times (10^{-10}m)^3$
$67.6A^3=67.6\times (10^{-10}\times 10dm)^3=67.6\times 10^{-27}dm^3=6.76\times 10^{-26}dm^3$
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