In English, "百千万" (bǎi qiān wàn) can be translated as "millions" or "hundreds of millions." For example, you could say "这个项目需要百千万美元的投资" (zhège xiàngmù xūyào bǎi qiān wàn měiyuán de tóuzī) to mean "this project requires hundreds of millions of dollars in investment."