The Communist Party of China was born on July 1, 1921, and how many birthdays will it be on July 1, 2012?
中国共产党是1921年7月1日诞生的，到2012年的7月1日是第多少个生日．
<gadget id="calculator">2_012 - 1_921</gadget>
<output>91</output>

<result>91</result>