Hartzell Inc. had the following data for $2020,$ in millions: Net income $=$$$600$; after$-$tax operating income $[RBrT(1-T)]=$$$700$; and Total assets $=$$$2,000.$ Information for $2021$ is as follows: Net income $=$$$82$; after$-$tax operating income $[BBrT(1-T)]=$$$850$; and Total assets $=$$$2,500.$ Assume the firm had no excess cash. How much free cash flow did the firm generate during $2021?$