Выполните действия (3 1/14 - 2 5/21)*(2,7-2,1) (4 13/18-3 7/9)*(1/2-4/17)

3 1/14 -2 5/21=(24-5) / 21=19/21
2,7-2,1=0,6=3/5
19/21*3/5=19/35

4 13/18 - 3 7/9=(31-7)/18=24/18= 4/3
1/2 - 4/17 = (17 - 8)/34=9/34
4/3*9/34=6/17