计算过程如下：
2/3×2/4×2/5×2/6×2/7×2/7×2/玉洋定远盟讲损么会歌9×2/9
=2/3×1/2×2/5×1/3×2/7×2/7×青顺解众绿课概跟然2/9×2/9
=1土比/3×2/5×1/3×2/7×2/7×2/9×2/9
=2/15×1/3×2/7×2/7×2/9×2/9
=2/45×2/7×2/我学7×2/9×2/9
=4/315×2/7×2/9×2/9
=8/2205×2/9慢行械基×2/9
=16/19845×2/9
=32/178605
