Xiaorong has a total of 35 coins of 2 cents and 5 cents. The total is 1 yuan and 15 cents. How many coins of 2 cents are there?
小容有2分、5分的硬币共35枚，一共是1元1角5分，2分的硬币有多少枚．
<gadget id="calculator">35 * 5</gadget>
<output>175</output>

<gadget id="calculator">175 - 115</gadget>
<output>60</output>

<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<result>20</result>