Mom, dad and Xiao Li are 72 years old this year. Five years ago, they were 58 years old. How old is Xiao Li this year?
Xiao Li is 4 years old now. If Xiao Li is more than 5 years old this year, her parents and Xiao Li were 15 years younger than they are now (3 × 5 = 15 years old) five years ago, and the total age of the three people in the question is only 14 years younger than before (72-58 = 14 years old), which means Xiao Li only increased by 4 years in five years, that is, Xiao Li was not born five years ago, so Xiao Li now has only