Xiao Ming wrote 5 big characters on the first day, and every day thereafter he wrote 2 more big characters than the previous day. After 6 days, how many big characters did Xiao Ming write in total?
小明第一天写5个大字，以后每一天都比前一天多写2个大字，6天后小明一共写了多少个大字．
<gadget id="calculator">5 + 5 + 2 + 5 + 2 + 2 + 5 + 2 + 2 + 2 + 5 + 2 + 2 + 2 + 2 + 5 + 2 + 2 + 2 + 2 + 2</gadget>
<output>60</output>

<result>60</result>