The education bureau of a certain county organized an academic exchange meeting, requiring every two of the 46 comrades attending the meeting to shake hands once, how many times Mr. Zhou should shake hands in total.
某县教育局组织了学术交流会，要求与会的46位同志每两人都要握一次手，周老师一共要握多少次次手．
<gadget id="calculator">46 - 1</gadget>
<output>45</output>

<result>45</result>