${140}\degree \times \frac{ π }{ {180}\degree } \mathnormal{rad}$
Cancel out the common factor ${20}\degree$$7 \times \frac{ π }{ 9 } \mathnormal{rad}$
Calculate the product$\begin{align*}&\frac{ 7π }{ 9 } \mathnormal{rad} \\&\approx2.44346\end{align*}$