Calculați folosind proprietățile înmulțiri
a)2/5*3/7*25/4
b)11/7*3/5*14/11
c)3/7*4/5*7/3
d)14/15*5/7*3/2
e)2/9*5/7*21/25*27/6
f)13/21*15/19*38/45*42/65
g)11/35*12/25*75/36*49/33
h)3/8*38/75*125*57*64/21
i)2/6*16/33*63/4*11/18