The price of 2 pocket knives is equal to that of 3 notebooks, and the price of 3 notebooks is equal to that of 6 pencils. If a pocket knife costs 1 yuan and 8 jiao, how much is a pencil?
2把小刀与3本笔记本的价钱相等，3本笔记本与6支铅笔的价钱相等，一把小刀1元8角，则一支铅笔多少元．
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">(9/5) / 6</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">2 * (3/10)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>