《宋书·志·卷十二》
推算发生合月份的朔日：将入纪月乘以通数，再除以曰法，其商为积曰，余数为小余。
推合月朔：以通数乘入纪月，满日法得一为积日，不尽为小余。
Calculate the first day of the month when the conjunction happens: Multiply the chronological month by the common number, then divide it by the day method, the quotient is the cumulative day, and the remainder is the minor remainder.
<s>[INST] Translate the following Classical Chinese text into English: 推合月朔：以通数乘入纪月，满日法得一为积日，不尽为小余。 [/INST] Calculate the first day of the month when the conjunction happens: Multiply the chronological month by the common number, then divide it by the day method, the quotient is the cumulative day, and the remainder is the minor remainder.</s>
Translate the following Classical Chinese text into English: 推合月朔：以通数乘入纪月，满日法得一为积日，不尽为小余。
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Calculate the first day of the month when the conjunction happens: Multiply the chronological month by the common number, then divide it by the day method, the quotient is the cumulative day, and the remainder is the minor remainder.
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