If a/b = 1/3, b/c = 2, c/d = 1/2, d/e = 3 and e/f = 1, then what is the value of abc/def ?  Select:
A) 27/4
B) 27/8
C) 3/4
D) 3/2
E) 1/4
Say a = 2. Then:   a/b = 1/3 --&gt; b = 6;   b/c = 2 --&gt; c = 3;   c/d = 1/2 --&gt; d = 6;   d/e = 3 --&gt; e = 2;   e/f = 1 --&gt; f = 2.   abc/def = (2*6*3)/(6*2*2) = 3/2.   Answer: 3/2.
<result>D</result>
If a/b = 1/3, b/c = 2, c/d = 1/2, d/e = 3 and e/f = 1, then what is the value of abc/def ?