The telecommunications company stipulates the charging standard for telephone calls: 0.2 yuan for calls within 3 minutes, and 0.3 yuan for every minute beyond 3 minutes.
电信公司规定电话的收费标准：3分钟以内收话费0.2元，3分钟以外每分钟收话费0.3元，小红与同学通话6分钟应付话费多少元．
<gadget id="calculator">6 - 3</gadget>
<output>3</output>

<gadget id="calculator">3 * 0.3</gadget>
<output>0.9</output>

<gadget id="calculator">0.2 + 0.9</gadget>
<output>1.1</output>

<result>1.1</result>