Instructions: In this task, you need to provide the correct option for a given problem from the provided options.
Input: Problem: the ratio of 2 numbers is 2 : 8 and their h . c . f . is 40 . their l . c . m . is ? 
Options: a ) 400 , b ) 120 , c ) 80 , d ) 320 , e ) 40
Output:
d