Programming :: Using Expr Command To Read Values From Two Different Files?

I have an assignment where I have to use an expr command to read values from File1.txt and File2.txtHeres the assignment:Create two files.File1 has one line with the value of 5.ile2 has one line with the value of 100.Edit your new file using Gedit or VI and change it so it performs the following actions:Read the values from the files above (file1 and file2)Divide the value from file2 by the value in file1.utput the result of this calculation to a new file called file3. My .scr file is week3prog3_george, in file1 I put var1=5, file2 is var1=20.Then, I put in my .scr file this:

#!/bin/bash
expr File2.txt / File1.txt

It returns an error message stating "non-integer argument."And...how do you point the .scr file to read values from two different files, and the book my school has provided does not contain the info I need.