B1. The floor function of any real number $a$ is the integer number denoted by $\lfloor a\rfloor$ such that $\lfloor a\rfloor \leq a$ and $\lfloor a\rfloor>a-1$. For example, $\lfloor 5\rfloor=5,\lfloor\pi\rfloor=3$ and $\lfloor-1.5\rfloor=-2$. Find the difference between the largest integer solution of the equation $\lfloor x / 3\rfloor=102$ and the smallest integer solution of the equation $\lfloor x / 3\rfloor=-102$.