In the formula "口/23=16...△", what is the largest divisor?
在"口/23=16…△"这个算式中，被除数最大是多少．
<gadget id="calculator">23 * 16</gadget>
<output>368</output>

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

<gadget id="calculator">368 + 22</gadget>
<output>390</output>

<result>390</result>