The wholesale price of a newspaper is 2.35 yuan, and the retail price is 2.5 yuan. Xiao Ming wants to sell newspapers on Sunday to earn 60 yuan. How many newspapers should he sell at least?
一份报纸的批发价是2.35元，零售价是2.5元，小明要星期天卖报赚60元钱，他至少要卖多少份报纸？
<gadget id="calculator">2.5 - 2.35</gadget>
<output>0.15</output>

<gadget id="calculator">60 / 0.15</gadget>
<output>400</output>

<result>400</result>