4.23×3.4≈ 2.54×1.3≈
1.24×3.82≈ 7.36×2.58≈
1.19×0.87≈ 4.05×1.23≈
5.2×4.4≈ 0.74×2.3≈
3.84×0.82≈ 7.05×1.7≈