三十万 (sānshíwàn): 300,000

Meanings

Zhège chéngshì yǒu sānshí wàn jūmín.

This city has 300,000 residents.

Bǐsài xīyǐn le sānshí wàn guānzhòng.

The competition attracted 300,000 spectators.

usage

Chinese counts in units of 万 (10,000). So 三十万 = 30 × 万 = 300,000. This is a key difference from English, which groups by thousands.

三 sān

十 shí

万 wàn