Here's how we get that:

* Mach 1: Represents the speed of sound, which is approximately 767 mph (1,230 km/h) at sea level.

* Mach 2.34: Means 2.34 times the speed of sound.

Therefore, Mach 2.34 is calculated as:

* 767 mph (Mach 1) * 2.34 = 1,726.64 mph

* 1,230 km/h (Mach 1) * 2.34 = 2,778.47 km/h