18 students took a group photo. It costs 26.4 yuan to take a photo. You can have 3 photos. If each person wants 1 photo now, they need to print it. It costs 0.64 yuan to print a photo. How much is the average per person?
18位同学合影留念，拍照需要26.4元，可以有3张照片，如果现在每人要1张照片，就需要加印，加印一张照片要0.64元，平均每人应付多少元？
<gadget id="calculator">18 - 3</gadget>
<output>15</output>

<gadget id="calculator">15 * 0.64</gadget>
<output>9.6</output>

<gadget id="calculator">9.6 + 26.4</gadget>
<output>36</output>

<gadget id="calculator">36 / 18</gadget>
<output>2</output>

<result>2</result>