If a solution of molarity $(M_1)$ is diluted by the addition of a solvent, its volume changes from $V_1$ to $V_2$. The molarity $(M_2$) of the new solution is given by the equation $M_1V_1 = M_2 V_2$. A solution of molarity 1.2 is diluted to make a new solution whose molarity is 0.1 M and volume is 1 L. The initial volume of the solution is