Question 325927
The symbol ! means factorial.

We multiply in a downward direction. 

200! = 200 x 199 x 198...all the way down to x 1 for the numerator.

198! = 198 x 197 x 196...all the way down to x 1 for the numerator.

As you can see, 198 down to 1 for the top and bottom of your fraction will cancel out leaving us with (200 x 199)/1.

We can use a calculator.

200!/198! = (200 x 199)/1 = 39,800