"Personal Computer" magazine is published once a month, and each issue is 35 yuan. How much does it cost to subscribe for a year?
《个人电脑》杂志每月出版一期，每期35元，订阅一年需花多少钱？
<gadget id="calculator">35 * 12</gadget>
<output>420</output>

<result>420</result>