Calculate the time required to run 1 km by the time required to run the distance.

(9.7+2) 1.5 = 7.8 (minutes)

Li Run 1 km takes an average of 7.8 minutes.

The decimal point is shifted to the right by one place, that is, the decimal point is enlarged by 10 times, so as long as 24.6 is divided by 10, it is the original quotient.

The final dividend divided by the quotient equals the divisor.

24.6÷ 10=2.46

3.69÷2.46= 1.5

The divisor is 1.5.