Z7-I-4 stars 4949

Write instead of stars digits so the next write of product of the two numbers to be valid:
∗ ∗ ∗
· ∗ ∗ ∗
∗ ∗ ∗ ∗
4 9 4 9
∗ ∗ ∗
∗ ∗ ∗ 4 ∗ ∗

Correct result:

a =  707
b =  176
c =  124432

Solution:

$b=176$

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