Please clarify the 401K contributions limits

那么，你最多可以放多少税后401K呢？国税局(IRS)每年会调整401K计划的上限，包括员工的贡献和雇主的匹配；2023年这个上限是6.6万美元。如果员工放满了2.25万的税前401K，公司匹配了1.125万(50%)，那么理论上员工可以再放3.225万的税后401K：
6.6万 - 2.25万 - 1.125万 = 3.225万

Are you sure what you talked above is correct? Per IRA, You can split your annual elective deferrals between designated Roth contributions and traditional pre-tax contributions, but your combined contributions can’t exceed the deferral limit - $22,500 in 2023...https://www.irs.gov/retirement-plans/roth-comparison-chart.

Please clarify.