5. A part is machined from a metal blank. The chips obtained from machining 8 parts can be remelted into one blank. How many parts can be made from 64 blanks?
5. 6) $64: 8=8$ (blanks) - can be manufactured from the waste when machining 64 parts;
2) $8: 8=1$ (blank) - can be manufactured from the waste when machining 8 parts;
3) $64+8+1=73$ (parts).

Answer: from 64 blanks, 73 parts can be manufactured.