Let’s do this by examples.
2/3 × 4
= (2 × 4)/3
= 8/3
9 / 8 × 2
= (9 × 2)/8
= 9/4
2/3 × 5/4
= (2 × 5)/(3 × 5)
= 10/12
4 × 3 2 / 7
= 4 × (3+2/7)
= 4 × ((3 × 7 + 2)/7)
= 4 × ((21 + 2)/7)
= 4 × 23/7
= (23 × 4)/7
= 92/7
7/2 × 4 3/5
= 7/2 × (4+3/5)
= 7/2 × ((4 × 5 + 3)/5)
= 7/2 × ((20 + 3)/5)
= 7/2 × 23/5
= (7 × 23)/(2 × 5)
= 161/10