The photographer charges 58.5 yuan for a group photo of 12 children, but only 4 photos are provided. If they are printed, each photo is charged 3.4 yuan. If each person wants a photo, how much does it cost in total?
摄影师给12位小朋友合影拍照，收费58.5元，但只提供4张照片，如果加印，每张收费3.4元．如果每人要一张照片，共需付多少元？
<gadget id="calculator">12 - 4</gadget>
<output>8</output>

<gadget id="calculator">3.4 * 8</gadget>
<output>27.2</output>

<gadget id="calculator">58.5 + 27.2</gadget>
<output>85.7</output>

<result>85.7</result>