All sites do conversions from global open resource, not rely on their few programmers

(1.5 inch)^3 has units of length^3

Google answered 55.306341 milliliters

Rather than treating each word problem separately just do the whole thing, consistently and coordinate with all search engines and sites so it is not “everyone doing their own thing)

(1.5*2.54 cm)^3 = 5.5306341E-5 meter^3

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for (1.5 inch)^3 in meter^3 they refer to a random set of conversion sites, all different ways and many wrong or approximate or undocumented.