UNIX for Dummies Questions & Answers

If I execute this command:
$ ls -lt | awk '{print $5}' | sort -nr |head -1

it returns the following value
57441881

If I execute this command:
$ ls -s | sort -nr | head -1 | cut -d" " -f1

it returns the same file but now in block size
112208

Is there a way I can calculate what the size in mb one block of data is? I want to create a shell script that has an "if block size > a hard-coded amount, do something. I want to translate block size into mb so that the rest of the team can understand what I am doing.

I tried 112208/57441881. This out put does not appear to be corrrect.

Your help will be highly appreciated.

To paraphase a recent statesman, it depends on what the meaning of MB is... 2^20 or 10^6? I use 2^20 so:
57441881 / 1048578 = 112208 / 2048 = 54