Can you help me please?

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible