Each storybook was 4.8 yuan, and each comic book was 7.9 yuan. The total cost was 199.8 yuan. I bought 12 storybooks and how many comic books.
故事书每本4.8元，连环画每本7.9元，一共花了199.8元，共买了12本故事书，多少本连环画．
<gadget id="calculator">4.8 * 12</gadget>
<output>57.6</output>

<gadget id="calculator">199.8 - 57.6</gadget>
<output>142.2</output>

<gadget id="calculator">142.2 / 7.9</gadget>
<output>18</output>

<result>18</result>