This is very easy you just have to reduce it
1/4 x 1/2 x 1/5 x 200
= 1/4 x 1/2 x 1/5 x 200/1
now divide 200 and 5 then what you get divide that of 200 with 2 then what you get divide that with 4 and then simply multiply it all!
= 5 ANSWER
if you still don't get then tell me and I'll help more!