is 443.97 KB, has a resolution of 845x360 pixels and was uploaded on July 18, 2019 @ 11:05 am by user: selmon. It is filed under the tags: invention, calculator, abacus, computer, gottfried wilhelm leibniz. Click the blue button at the top to freely download: Mathematics Stepped Reckoner Leibniz Wheel Mechanical Calculator Inventor Mathematician png.