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Proof step 15 from proof fits-law-mul (previous step)

b2i(by1) * b2i(by2) < ~32768, b2i(by1) < 0, 0 < b2i(by2) ⊦ b2i(by1) * b2i(by2) = s2i(i2s(b2i(by1) * b2i(by2)))

User applied rule cut formula

And obtained the following new goals

Proof step 16:
~32768 = ~256 * 128, b2i(by1) * b2i(by2) < ~32768, b2i(by1) < 0, 0 < b2i(by2) ⊦ b2i(by1) * b2i(by2) = s2i(i2s(b2i(by1) * b2i(by2)))

Rule argument

fma: ~32768 = ~256 * 128

Additional information

Used formulas: ~32768 = ~256 * 128