Naughty wants to sell newspapers to earn money to buy a 28 yuan stationery box and donate it to children in mountainous areas. The wholesale price of this kind of newspaper is 0.85 yuan per copy, and the selling price is 1.2 yuan per copy. How many copies of the newspaper does he need to sell to realize his wish?
淘气想卖报纸挣钱买一个28元的文具盒捐给山区的小朋友．这种报纸的批发价是每份0.85元，出售价是每份1.2元，他需要卖出多少份报纸才能实现自己的愿望？
<gadget id="calculator">1.2 - 0.85</gadget>
<output>0.35</output>

<gadget id="calculator">28 / 0.35</gadget>
<output>80</output>

<result>80</result>