Complete the given code in the JavaScript block by performing the following tasks:

Addition: Add the variables var$1$ and var$2,$ and store the sum in the variable result.

Multiplication: Multiply the variables var$1$ and var$2,$ and store the multiplication in the variable result.

Subtraction: Subtract the variables var$1$ and var$2,$ and store the difference in the variable result.

Division: Divide the variables var$1$ and var$2,$ and store the quotient in the variable result.

Modulus: Find the remainder of the variables var$1$ and var$2,$ and store the remainder in the variable result.

Note: In the JavaScript block, replace the comments with the appropriate code, if required.