Xiao Ming, Xiao Hong, and Xiao Ying went on a picnic. Xiao Ming bought 5 loaves of bread, and Xiao Ying bought 7 loaves of bread. After the three of them ate on average, Xiao Hong paid 3.2 yuan. How much should Xiao Ying get back?
小明、小红、小英三人去郊游，小明买了5个面包，小英买了7个面包，三人平均吃了后，小红付出3.2元，小英应收回多少元．
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">7 - 4</gadget>
<output>3</output>

<gadget id="calculator">3.2 / 4</gadget>
<output>0.8</output>

<gadget id="calculator">3 * 0.8</gadget>
<output>2.4</output>

<result>2.4</result>