请告诉我参加活动的人数，好准备座位。

Qǐng gàosu wǒ cānjiā huódòng de rénshù, hǎo zhǔnbèi zuòwèi.

Please tell me the number of people joining the event so I can prepare seats.

如果人数太多，我们就分成两个小组。

Rúguǒ rénshù tài duō, wǒmen jiù fēnchéng liǎng gè xiǎozǔ.

If the number of people is too large, we will divide into two small groups.

今天来参加会议的人数不多。

Jīntiān lái cānjiā huìyì de rénshù bù duō.

The number of people coming to the meeting today is not large.