https://store-images.s-microsoft.com/image/apps.2095.d5816188-bd4a-4012-b59c-8c7105b2daad.b5a80718-7e59-4e41-96ff-ce9a54ab0bb9.dabd7a92-fb6d-4e36-8c63-94586393dd74.png

FisCalc

by ZX81.