A spherical bubble inside water has radius 𝑅. Take the pressure inside the bubble and the water pressure to be $$p_0$$. The bubble now gets compressed radially in an adiabatic manner so that its radius becomes (𝑅 − 𝑎). For $$a \ll R$$ the magnitude of the work done in the process is given by $$(4 \pi p_0 R a^2)X^2$$, where 𝑋 is a constant and $$\gamma = \frac{C_p}{C_V} = \frac{41}{30}$$. The value of X is ____________.