At 200 dpi resolution, 2 cm x 4.5 cm is equivalent to 158 x 354 pixels
Explanation:
The dimensions given are 2 cm (width) x 4.5 cm (height)
Since 1 inch is equivalent to 2.54 centimeters
(2/2.54) = 0.79
(4.5/2.54) = 1.77
2 cm x 4.5 cm is equivalent to 0.79 in x 1.77 inch
According to, the given dpi (dots per inch or pixels per inch) of 200 which means there are 200 dots or pixels in 1 inch.
Therefore, the pixel dimensions can be calculated as follows: 0.79 x 200 x 1.77 x 200 pixels = 158 x 354 pixels.