2× 4× 3/4 of 5 = 2/5 * 3 = 6/5.

5× 16× 5× 2 1 = 16*3=48.

1× 15, 1+3, 1 = 6/ 15 * 1/2 = 3/ 15.

4×9 × 7×8 × 5 =7/9* 1/2=7/ 18

5×9+9 of 6 is 5×6+0 = 1 * 5/9 = 5/9.

Hope to adopt