8.6*1.39=11.954 not 12. They said the area was 12.
What are the appropriate significant digits for a baby blanket within the context of this problem, as stated and making no assumptions?
I believe it may be 2, because of the area value of 12, but I've never liked the constraints on pure mathematics enforced in engineering disciplines.
8.60555127546 x 1.39444872454
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Solve the equation I gave you to as many significant digits as you want.
But be advised of this very simple fact: There is no measurement you can do with a ruler that has more than three significant digits, no matter how exact it looks. That includes something that appears to be "exactly" 3 inches by "exactly" 4 inches.
The truth is most actual measurements are irrationals, and the number of measurements that are integral (or even rational) is a set with probability measure ZERO.