> Therefore, the meter may be defined as "the distance light travels in a vacuum in one of those cesium-133-related periods, times 9,192,631,770, divided by 299

> Therefore, the meter may be defined as "the distance light travels in a vacuum in one of those cesium-133-related periods, times 9,192,631,770, divided by 299,792,458". Right, but the constant c didn't have that exact value until 2019. Prior to 2019, c had an infinite number of digits. Thus, the numerical representation of constants with units can change as the definitions of the units themselves change.