What does strongly typed means in .NET framework?

Question

This morning was going through a book where I found a paragraph as stated below :

Each data field in a table is a strongly typed data member, fully compliant wit

Answer 1

For e.g you cannot Multiply or Divide two different types i.e String vs Integer

var answer = 1 * "1"; // you cannot do this

You have to explicity cast it, this is known as strongly typed

where as if you see in php

$x = "3" * 1; // is correct in php

So here you dont need to explicitly cast it.