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30 6- , , , , , . , . , , , . 15 . , 7- , 8- ; 3/8 : 12 . ( ) ; , , , , . 12 , .

= 40
= 10 = 12,29 .
= 1/16 = 0,768 .
= 1/20 = 5 = 0,61 .
= 40 = 16,38 .
= 32 = 96 = 409,51241 .


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