Plant chrysanthemums at the largest and equal distance on the side of a rectangular flowerbed with a length of 48 meters and a width of 42 meters, and then plant four roses between every two chrysanthemums. How many roses are planted in this garden?
在长48米、宽42米的长方形花圃的边上以最大且相等的距离栽上菊花，再在每两棵菊花之间栽上4棵月季花．这个花圃一共栽了多少月季花？
<gadget id="calculator">48 / 6</gadget>
<output>8</output>

<gadget id="calculator">42 / 6</gadget>
<output>7</output>

<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<result>120</result>