Every December 1st is World AIDS Day. It is reported that there were only 5 cases of AIDS in Ningbo in 2006, and the number climbed to 69 cases in 2010. How much has it increased in 4 years?
每年的12月1日是世界艾滋病日，据悉，宁波2006年仅有艾滋病5例，2010年攀升至69例，4年间增加了多少
<gadget id="calculator">69 - 5</gadget>
<output>64</output>

<gadget id="calculator">64 / 5</gadget>
<output>64/5 = around 12.8</output>

<result>64/5 = around 12.8</result>