In February 2013 this year, Xiao Ming practiced 8 brush characters every day. In February last year, Xiao Ming practiced 5 brush characters every day. How many more brush characters did Xiao Ming practice in February this year than in February last year?
今年2013二月份小明每天练习8个毛笔字，去年二月份小明每天练习5个毛笔字，小明今年二月份比去年二月份多练习毛笔字多少个？
<gadget id="calculator">8 * 28</gadget>
<output>224</output>

<gadget id="calculator">5 * 29</gadget>
<output>145</output>

<gadget id="calculator">224 - 145</gadget>
<output>79</output>

<result>79</result>