найдите значение выражения а ) ( 6 1/8*1 2/7-2 11/14*1 8/13)*1 3/5

1) 6 1/8 * 1 2/7 = 49/8 * 9/7 = 63/8
2) 2 11/14 * 1 8/13 = 39/14 * 21/13= 9/2
3) 63/8 - 9/2 = 63/8 - 36/8 = 27/8
4) 27/8 * 1 3/5 = 27/8 * 8/5 = 27/5 = 5,4