Naughty bought a notebook for 10 yuan, and got back 3 yuan and 6 cents. What is the price of a notebook?
淘气用10元钱买了一本笔记本，找回3元6角，一本笔记本的价钱是多少元．
<gadget id="calculator">6 / 10</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3 + (3/5)</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">10 - (18/5)</gadget>
<output>32/5 = around 6.4</output>

<result>32/5 = around 6.4</result>