An artist creates a solid sculpture made from $7\mathrm{.}40kg$ of aluminum. She wishes to create an identical sculpture, using the same mold used to make the original, out of solid lead. What is the mass $($in $kg)$ of the lead sculpture? $($The density of aluminum is $2\mathrm{.}70{10}^{3}k\frac{g}{m^3},$ and that of lead is $11\mathrm{.}30{10}^{3}k\frac{g}{m^3}.)$

$kg$