Work out the surface area of a cuboid 2cm by 5cm by 3cm?

The formula to find the surface area of a cuboid is 2 (a^2+b^2+c^2) (^2 is just to the second power or squared or whatever you call it but it cant supersript so it looks messy sorry) so in this instence it would be 2 (2^2+5^2+3^2) which equals 76