Xiaohua took 10 yuan to buy two notebooks, and got back 2.6 yuan, how much is each notebook.
小华带了10元钱去买了两个本子，找回2.6元，每个本子多少元．
<gadget id="calculator">10 - 2.6</gadget>
<output>7.4</output>

<gadget id="calculator">7.4 / 2</gadget>
<output>3.7</output>

<result>3.7</result>