Calculate alberts average speed
time: 12 minutes
distance: 100 meters

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Can someone me and plz do the problem

Acircle has a circumference of 28.36 units what is the diameter of the circle