Adocument that is 35 in. by 40 in. is redrawn at 1 1/2 scale and then redrawn at 1/4 scale. what are the final dimensions of the drawing?

The dimension of the document is 35 inches by 40 inches.
It is redrawn at a scale of 1 1/2 or 3/2 or 1.5
The dimension will be:
35 * 1.5 = 52.5 in
40 * 1.5 = 60 in

Then redrawn again at 1/4 or 0.25
52.5 * 0.25 = 13.125 in
60 * 0.25 = 15 in

So the final dimensions of the drawing is 13.125 in by 15 in

Can u connect a photo to this problem? I DONt really understand.

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