The wholesale price of a newspaper is 2.35 yuan, and the retail price is 2.5 yuan. Xiao Ming earned 30 yuan by selling newspapers on Sunday. How many copies of this newspaper did he sell?
一份报纸的批发价是2.35元，零售价是2.5元，小明用星期天卖报赚了30元钱，他卖了多少份这样的报纸？
<gadget id="calculator">2.5 - 2.35</gadget>
<output>0.15</output>

<gadget id="calculator">30 / 0.15</gadget>
<output>200</output>

<result>200</result>