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How to do the fourth and eighth questions on page 26 of Huanggang Mathematics Volume II?
4 questions 8 times 8 times 8=5 12cm3

5 12 divided by 2 divided by 2= 128cm

Answer: It can be forged into 128cm long iron bars.

Eight questions 6 times 4 times (2.5-2)= 12dm3.

A: The volume is 12dm3.