Required Mathematical Intelligence

Chapter 152 Warm Four Seasons
Spring and summer × autumn and winter = spring, summer, autumn and winter
Spring and winter × autumn and summer = spring, summer, autumn and winter
In the formula, spring, summer, autumn and winter each represent four different numbers. Can you point out what numbers they represent?

[Answer: Spring=2; Summer=1; Autumn=8; Winter=7.]
(End of this chapter)