6 × 3 / 4 = 27 / 5 × 4 / 3 = 15 / 2 × 6 / 5 = remember about!

6 × 3 / 4 = 27 / 5 × 4 / 3 = 15 / 2 × 6 / 5 = remember about!

6 × 3 / 4 = 18 / 4 = 9 / 2
27 / 5 × 4 / 3 = 5x3 / 27x4 = 36 / 5
15 / 2 × 6 / 5 = 2x5 / 15x6 = 9