There are 1644 people dining in the cafeteria. According to one table for every 12 people, 125 tables have been prepared. How many tables are still missing?
食堂有1644人用餐，按照每12人用一张桌子，已经准备好125张桌子，还缺多少张桌子？
<gadget id="calculator">1_644 / 12</gadget>
<output>137</output>

<gadget id="calculator">137 - 125</gadget>
<output>12</output>

<result>12</result>