\[\boxed{\mathbf{800\ (800)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{23}{10} = 2\frac{3}{10} = 2,3\]
\[2)\ \frac{851}{100} = 8\frac{51}{100} = 8,51\]
\[3)\ \frac{5273}{1000} = 5\ \frac{273}{1000} = 5,273\]
\[4)\ \frac{3636}{100} = 36\frac{36}{100} = 36,36\]
\[5)\ \frac{9132}{1000} = 9\frac{132}{1000} = 9,132\]
\[6)\ \frac{654321}{10000} = 65\ \frac{4321}{10000} =\]
\[= 65,4321\]
\[\boxed{\ \mathbf{800}.\ }\]
\[V = S_{осн} \cdot h = 15 \cdot 6 = 90\ см^{3}.\]
\[Ответ:90\ см^{3}.\]