[填空题]
A water tank is the shape of ad1ohhb rn5/gq3+ fo- n cube with sidh8ek m,qt.ahri49 v2ues 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.)