Properties of Solids and Liquids: JEE Main 2026 Physics question

The surface tension of a soap solution is $3.5\times10^{-2}$ N/m. The work required to increase the radius of a soap bubble from 1 cm to 2 cm is $\alpha\times10^{-6}$ J. The value of $\alpha$ is ______. ($\pi=22/7$)