or
or
Obeservation of the results tell us that the multiplier should end with a 3 o as ( 3×3) = 9 and should be between 140 and 160 as ( 423 × 160) = 67680
The possible multiplicants thoufare are 143, 153, and 163 while trying to multiply 153, and 163 don't give 89 as the last 2 digit
Multiply 423 to arrive to 60489
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