8⋅15⋅30/25⋅56⋅15 =8*30/25*56=4*2*5*6/5*5*7*2*4=6/5*7=6/35 меньше чем
8⋅81⋅59/59⋅45⋅32=8*9*9*59/59*9*5*8*4=9/5*4=9/20
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8⋅15⋅30/25⋅56⋅15 =8*30/25*56=4*2*5*6/5*5*7*2*4=6/5*7=6/35 меньше чем
8⋅81⋅59/59⋅45⋅32=8*9*9*59/59*9*5*8*4=9/5*4=9/20