Buy a bottle of ink for 3 yuan and 8 cents, and 3 pencils for a total of 1 yuan and 5 cents. How much is a bottle of ink more expensive than a pencil?
买一瓶墨水3元8角钱，3枝铅笔共1元5角钱，一瓶墨水比一枝铅笔贵多少元钱．
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 + (4/5)</gadget>
<output>19/5 = around 3.8</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) / 3</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(19/5) - (1/2)</gadget>
<output>33/10 = around 3.3</output>

<result>33/10 = around 3.3</result>