What are the lengths and widths of the 3.5-inch mobile screen?

What are the lengths and widths of the 3.5-inch mobile screen?


Generally, inches are diagonal, 1 inch = 2.54cm, so 3.5 inches should be 3.5x2.54 = 8.89cm
The diagonal is 8.89cm, calculate the ratio of 4:3, according to the law of hook 3 strands 4 strings 5, 3.5 inch screen:
Length: 7.1cm
Width: 5.33cm