The 18 members of the school football team took a group photo. The price for printing three 6-inch photos is 4.5 yuan, plus 0.3 yuan for each photo. If each person gets one, how much is the average cost per person?
学校足球队18人合影留念，照6寸照片洗三张价格是4.5元，另外加洗每张0.3元，如果每人各得一张，平均每人需多少元．
<gadget id="calculator">18 - 3</gadget>
<output>15</output>

<gadget id="calculator">0.3 * 15</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 + 4.5</gadget>
<output>9</output>

<gadget id="calculator">9 / 18</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>