def METHOD_NAME(self) -> None:
    f1 = ff.parse('s(3,3)|c(I,str)|i(I,str)|v(int)')
    f2 = ff.parse('s(2,2)|c(I,str)|i(I,int)|v(int)') % 3
    f3 =  f1.via_T.via_fill_value(1) * f2.iloc[0]
    self.assertEqual(f3.to_pairs(),
            (('zZbu', (('zUvW', 84967), ('zZbu', 0), ('ztsv', 185734))), ('ztsv', (('zUvW', 5729), ('zZbu', 0), ('ztsv', -82314))), ('zUvW', (('zUvW', 30205), ('zZbu', 0), ('ztsv', 182602))))
            )
    f4 =  f1.via_fill_value(1).via_T * f2.iloc[0]
    self.assertEqual(f4.to_pairs(),
            (('zZbu', (('zUvW', 84967), ('zZbu', 0), ('ztsv', 185734))), ('ztsv', (('zUvW', 5729), ('zZbu', 0), ('ztsv', -82314))), ('zUvW', (('zUvW', 30205), ('zZbu', 0), ('ztsv', 182602))))
            )