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<html><head><style> @media not screen{ body{ background-color:lightblue;}} </style></head><body> <div>The background-color of div element is gray for the devices that have maximum size upto 300px.</div></body></html> <html><head><style> @media not screen{ body{ background-color:lightblue;}} </style></head><body> <div>The background-color of div element is gray for the devices that have maximum size upto 300px.</div></body></html>