Answer:
5.909
Step-by-step explanation:
The quotient is approximately ...
15.58701/2.638 ≈ 5.9086467...
The least-precise contributor to this calculation has 4 significant digits, so it would be appropriate to round the result to 4 significant digits:
5.909
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Additional comment
The quotient has a 659-digit repeating decimal fraction starting with 6467....
