[填空题]
A water tank is the shape of a cube w l(c/j s qhr;s7q*(6qamhs d4pwqt8 4git, 0ot / lrk22wdwa de,kj7ix-qh sides of $3.00 \mathrm{~m}$. Each side is measured with an uncertainty of $1.0 \%$. What is the absolute uncertainty in the volume of the tank? (please only input numerical value without units and without the $\pm$ symbol.)