Li Lei bought an exercise book and two pens for a total of 1.4 yuan. The price of an exercise book is 1.5 times that of a pen. What are the prices of a pen?
李雷买了一个作业本和两支笔一共花了1.4元，一个作业本的价格是一支笔的1.5倍，一只笔的价格分别是多少？
<gadget id="calculator">1.5 + 2</gadget>
<output>3.5</output>

<gadget id="calculator">1.4 / 3.5</gadget>
<output>0.4</output>

<result>0.4</result>