Answer :

5 2/6 = 5 1/3

5 x 4 = 20
1/3 x 4 = 4/3

20 + 4/3 = 20 + 1 1/3 = 21 1/3
TSO
5 2/6 x 4 = 5 1/3 x 4 =

16/3 x 4 = 64/3 = 

21 1/3