How do I find the output frequency of a digital counter?

[TVguy]

Since you divide
a) 1 MHz
b) 0.4 MHz (400 kHz)
c) 800 kHz

 

[joe_664@ymailecom]

I'm given the input frequency (4MHz) and there's 3 counters attached in a row. The first is CTR DIV 4, the second CTR DIV 10, the third CTR DIV 5.