1 4/5*1 2/3*2 1/7*4 2/3

Question

1 4/5*1 2/3*2 1/7*4 2/3

Answer 1

1 4/5×1 2/3×2 1/7×4 2/3=
9/5×5/3×15/7×14/3=(9×5×15×14)/(5×3×7×3)=
30/1=30;