Mom: I was born on September 2, 1974. Grandma: I was born on March 18, 1951. Question: How old is grandma older than mother?
妈妈：我是1974年9月2日出生的．姥姥：我出生在1951年3月18日，问：姥姥比妈妈大多少岁呢？
<gadget id="calculator">1_974 - 1_951</gadget>
<output>23</output>

<result>23</result>