Are you wondering how a serious item as a calculator is presented within this website that talks about pursuits and hobbies? There are two reasons. The first: it has been my pleasure to develop it and learn a bit of Javascript. The second is for you, because using it you might save some time and spend it for more amusing things. On Internet you can find a lot of sites offering calculators, even very sophisticated. But the one I am offering here has the following features:1. it is free
2. it can be used on line or downloaded to your PC to work unconnected,
3. it joins its keyboard with a “virtual paper roll” to record all data and operations you make .
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