Multiply a 4-digit number by 1-digit (5C7a)
Multiply a 4-digit number by 1-digit.
            
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        Multiply a 4-digit number by 1-digit (5C7a)
Multiply a 4-digit number by 1-digit.
Multiply a 4-digit number by 1-digit.
Multiply a 4-digit number by 1-digit.