A ribbon, cut a section every 1.5 decimeters to make a bow, a total of 28 bows were made, and there was 1.2 decimeters left, how many decimeters was this ribbon?
一根彩带，每1.5分米剪一段做一个蝴蝶结，一共做了28个蝴蝶结，还剩1.2分米，这根彩带原长多少分米？
<gadget id="calculator">1.5 * 28</gadget>
<output>42</output>

<gadget id="calculator">42 + 1.2</gadget>
<output>43.2</output>

<result>43.2</result>