Xiao Ming bought four copies of "Science and Technology Pictorial" and "Fun Mathematics", paid 30 yuan, and got back 4.8 yuan. "Fun Mathematics" is 2.6 yuan per copy, how much is "Science and Technology Pictorial" per copy?
小明买《科技画报》和《趣味数学》各4本，付出30元，找回4.8元．《趣味数学》每本2.6元，《科技画报》每本多少元？
<gadget id="calculator">30 - 4.8</gadget>
<output>25.2</output>

<gadget id="calculator">25.2 / 4</gadget>
<output>6.3</output>

<gadget id="calculator">6.3 - 2.6</gadget>
<output>3.7</output>

<result>3.7</result>