The divisor is 23 and the quotient is 28. When the remainder is the largest, what is the dividend?
除数是23，商是28，当余数最大时，被除数是多少
<gadget id="calculator">23 * 28</gadget>
<output>644</output>

<gadget id="calculator">23 - 1</gadget>
<output>22</output>

<gadget id="calculator">644 + 22</gadget>
<output>666</output>

<result>666</result>