Xiaohong has 2.8 yuan, and Xiaoli has 3 yuan and 20 cents. The sum of their money can buy two pens. How much is each pen?
小红有2.8元钱，小丽有3元2角钱，她们的钱合起来刚好能买到两支钢笔，每支钢笔多少元钱．
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 + (1/5)</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">2.8 + (16/5)</gadget>
<output>6</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>