Janet Yellen said on Monday that President Joe Biden's $1.9 trillion coronavirus aid package will provide enough resources to fuel a "very strong" US economic recovery, but will not address longstanding inequality problems."This is a bill that will really provide Americans the relief they need to get to the other side of the pandemic, and we expect the resources here to really fuel a very strong economic recovery," Yellen said in an interview on MSNBC.She repeated her expectations that the package would allow the United States to return to pre-pandemic "full employment" levels by next year.Yellen said there would still be longstanding inequality problems in the economy that needed to be addressed by further legislation.