Given the task definition and input, reply with output. Given a sentence in the Japanese, provide an equivalent translation in Thai that retains the same meaning through the translation. In translation, keep numbers as it is.

これは全長約9マイル、幅約30ヤードの油膜を引き起こした。

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
ก่อให้เกิดคราบน้ำมันลอยบนผิวทะเลชายฝั่งยาวประมาณ 9 ไมล์และกว้าง 30 หลา