Uncle Wang bought 8 workbooks from the store, gave the salesperson 100 yuan, and got back 11.2 yuan. How much is each workbook?
王叔叔从商店买回8个工作本，给售货员100元，找回11.2元，每个工作本多少元？
<gadget id="calculator">100 - 11.2</gadget>
<output>88.8</output>

<gadget id="calculator">88.8 / 8</gadget>
<output>11.1</output>

<result>11.1</result>