A row of flowers was placed at the school gate, and three pots of roses were placed between two pots of chrysanthemums, a total of 112 pots of flowers were placed. If the first potted flower is a chrysanthemum, how many pots of roses are there in total?
校门口摆了一排花，每两盆菊花之间摆3盆月季，共摆了112盆花．如果第一盆花是菊花，那么共摆了多少盆月季花？
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">112 / 4</gadget>
<output>28</output>

<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<result>84</result>