Multi-digit numbers in Chinese are read digit-by-digit for room numbers, route numbers, phone numbers, and dates: 四一零 (sì yī líng) for 410, not 四百一十 (sìbǎi yīshí, 'four hundred ten'). Use 四百一十 for actual quantities.
mistakes
Note that 一 (yī) does NOT become 幺 (yāo) here — 幺 is mostly reserved for spoken phone numbers and military/airline contexts to avoid mishearing 一 (yī) as 七 (qī). Written/announced room numbers use 一.
