"三十八" is the Chinese number "thirty-eight." In English, this number is said as "thirty-eight." The number comes from the combination of the digits "3" and "8," which represent the quantity. Here are some example sentences in English and their translations in Chinese:

There are thirty-eight students in our class. (我们班有三十八名学生。)

He is thirty-eight years old. (他三十八岁。)

The temperature today is thirty-eight degrees Celsius. (今天的温度是三十八摄氏度。)