A man in casual clothing stands beside a little girl, both looking attentively at a blackboard full of equations and diagrams. — Stock photos

"A man in casual clothing stands beside a little girl, both looking attentively at a blackboard full of equations and diagrams." is a stock image by HayDmitriy. It’s available in the following resolutions: 1000 x 667px, 2000 x 1333px, 8256 x 5504px. The minimum price for an image is 2.99$. Image in the highest quality is 8256 x 5504px, 300 dpi, and costs 9.99$.