Grandma is 77 years old this year, 5 years older than Beibei, who is 6 times her age. How old is Beibei?
奶奶今年77岁，比贝贝年龄的6倍还大5岁，贝贝今年多少岁？
<gadget id="calculator">77 - 5</gadget>
<output>72</output>

<gadget id="calculator">72 / 6</gadget>
<output>12</output>

<result>12</result>