India also has a splendid culture like China. In ancient India, there was such an interesting math problem: there was a group of bees, (1/5) landed on the peony flower, (1/3) landed on the peony flower, the two The difference is three times that of the former, flying to the rose flower, and finally a small bee is left flying between the fragrant jasmine and magnolia flowers. How many bees are there in total?
印度也像中国一样有着灿烂的文化，古代印度有这样一道有趣的数学题：有一群蜜蜂，其中(1/5)落在牡丹花上，(1/3)落在桅子花上，这两者的差的三倍，飞向月季花，最后剩下一只小蜜蜂在芳香的茉莉花和玉兰花之间飞来飞去，共有多少只蜜蜂．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) - (1/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(2/15) * 3</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/5) - (1/3) - (2/5)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / (1/15)</gadget>
<output>15</output>

<result>15</result>