《宋史·列传·卷二百二十七》
宋军从出兵镇压到凯旋归来，前后用四百五十天。
王师自出至凯旋，四百五十日。
The Song army took 450 days from the time they marched out to suppress the rebellion to the time they returned in triumph.
<s>[INST] Convert the following modern Chinese text into Classical Chinese: 宋军从出兵镇压到凯旋归来，前后用四百五十天。 [/INST] 王师自出至凯旋，四百五十日。</s>
Convert the following modern Chinese text into Classical Chinese: 宋军从出兵镇压到凯旋归来，前后用四百五十天。
user
王师自出至凯旋，四百五十日。
assistant