The price of a fountain pen is 15 yuan, which is 2 yuan less than 5 times the price of a ballpoint pen. How much is the price of a ballpoint pen? (solution by equation)
一支钢笔的价格是15元，比一支圆珠笔的价格的5倍少2元，一支圆珠笔价格是多少元？(用方程解)
<gadget id="calculator">15 + 2</gadget>
<output>17</output>

<gadget id="calculator">17 / 5</gadget>
<output>17/5 = around 3.4</output>

<result>17/5 = around 3.4</result>