Zhang Hua bought 2 copies of "Story King" and 2 cassettes at Xinhua Bookstore. The total cost was 36 yuan, and each tape was 8 yuan. How much is each "Story King"?
张华在新华书店买了2本《故事大王》和2盒磁带，共用去36元，每盒磁带8元，每本《故事大王》多少元？
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">36 - 16</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>