13.447 Comparing two bars having the shape of a rectangular parallelepiped, establish that the length, width, and height of the second bar are respectively 1 cm larger than those of the first bar, and the volume and total surface area of the second bar are respectively $18 \mathrm{~cm}^{3}$ and $30 \mathrm{~cm}^{2}$ larger than those of the first. What is the total surface area of the first bar