70,4-67,32:(30-13,5)·8,4
70,4-67,32:16,5*8,4=70,4-4,08* *8,4=70,4-34,272=36,128
30-13,5=16,5 67,32:16,5=4,08 4,08*8,4=34,272 70,4-34,272=36,128