Create a script file that creates four variables $($Var$1,$ Var$2,$ Var$3,$ Var$4)$ that are calculated as follows:

Var$1$ is defined by the addition of $654\mathrm{.}2$ with $456\mathrm{.}78.$

Var$2$ is defined by the subtraction of $234\mathrm{.}56$ from $9876\mathrm{.}2$

Var$3$ is defined by multiplying $123\mathrm{.}45$ by $35$

Var$4$ is defined by dividing $789$ by $1\mathrm{.}23$