A piece of wire is $240\text{cm}$~long.  Peter cuts two $45\text{cm}$~lengths off the wire.  He then cuts the rest of the wire into as many $40\text{cm}$~lengths as possible.  Work out how many $40\text{cm}$~lengths of wire Peter cuts. 
Overseas Competition->Knowledge Point->Word Problem Modules->Applying of Multiplication and Division