翻译一道gmat数学题并求解On a scale that measures the intensity of a ce

翻译一道gmat数学题并求解
On a scale that measures the intensity of a certain phenomenon, a reading of n+1 corresponds to an intensity that is 10 times the intensity correspongding to a reading of n. On that scale, the intensity corrrespongding to a reading of 8 is show many times as great as the intensity correspongding to a reading of 3?