The "Cross-Strait, Four Places" Children's Mathematics Invitational Competition starts at 9:00 and ends at 10:30. During this period, how many times did the second hand on the clock point to "12".
"两岸四地"少年儿童数学邀请赛个人赛是从9：00开始到10：30结束，那么这期间，钟表上的秒针指向"12"处有多少次．
<gadget id="calculator">90 / 1</gadget>
<output>90</output>

<result>90</result>