Related Post: 5 8r 2 3 5 9 5 8 R 2 3 )= 5 9 3 5 8 2 5 9 5 8 3 2 ) 9 1 8 5 2 3 9 4 5/9 * 2/3 5/8 * 2/5 3/5*2/5