My calculator is not working properly. Only the

__add__and

__reciprocal__buttons work, as well as the numbers 0-9.

Can you work out how to

__halve__any number?

Now the

__subtract__button has started working.

I think this means I can now

__square__any number - can you work out how?

Now, I think I can also calculate the

__product__of any number. How?

Are there any other operations I can do with only

__add__,

__subtract__and

__reciprocal__?

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I would love to hear your experiences when solving this problem, in particular with regards to getting involved.