Multiplying several numbers within a text string, is this possible?

Question

I have cell A1 which is a text string:

100 blue cars, 100 red cars, 100 yellow cars

In cell B1 I have a number which is a multiplier say 2.

Is it possible to change the numbers within cell A1 dependant on the value in B1.

Eg.

A1: 300 blue cars, 300 red cars, 300 yellow cars

B1: 3

Answer 1

=100*B1&" blue cars, "&100*B1&" red cars, "&100*B1&" yellow cars"

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=ARRAYFORMULA(TEXTJOIN(", ", 1, REGEXEXTRACT(SPLIT(A1, ","), "\d+") * B1&
                                REGEXEXTRACT(SPLIT(A1, ","), "\d+(.*)")))