On Sunday morning, Xiaohui finished his homework at home and wanted to invite someone to play table tennis in the afternoon, so he first called his classmate Xiaoyu, and the call lasted 4 minutes, and then called his classmate Xiaoying, and the call lasted 5 minutes. We know that the charge for the first three minutes of a local call is 20 cents, and 10 cents per minute thereafter. Please calculate how much Xiaohui will pay for these two calls.
星期天上午，小辉在家里写完家庭作业，想约人下午去乒乓球，于是他先给同学小雨打了一个电话，通话时间为4分钟，又给同学小英打了一个电话，通话时间是5分钟．我们知道市内电话前三分钟收费2角，以后每分钟1角，请你算一算小辉打这两个电话要付多少电话费．
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">1 * 1</gadget>
<output>1</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">2 + 1 + 2 + 2</gadget>
<output>7</output>

<result>7</result>