During the earthquake relief donation, Mr. Wang took pictures of the students. Teacher Wang spent 21.6 yuan to develop a roll of film, and added 12 of them to be processed, and each additional film cost 0.55 yuan. How much did she spend in total?
抗震救灾捐款中王老师给同学们照相．王老师冲洗一卷胶卷花去21.6元，又加洗了其中的12张，加洗每张要花0.55元，她共花了多少元？
<gadget id="calculator">12 * 0.55</gadget>
<output>6.6</output>

<gadget id="calculator">6.6 + 21.6</gadget>
<output>28.2</output>

<result>28.2</result>