Xiaoli was born on February 29, 2004. By the end of February this year, how many birthdays did she have?
小丽是2004年2月29日出生的，到今年2月底，她过了多少个生日．
<gadget id="calculator">2_016 - 2_004</gadget>
<output>12</output>

<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<result>3</result>