3×3×2:6×8=9×2:6×8=18:6×8=3×8=24
8×5:10:2=40:10:2=4:2=2
50:5×2:5×7=10×2:5×7=20:5×7=4×7=28
90:9×3:5=10×3:5=30:5=6