A and B buy a basket of watermelons together, A buys (2/5) more than 5.5 kilograms, and B buys exactly half of it, how many kilograms of watermelons are there in total?
甲乙合买一筐西瓜，甲买了其中的(2/5)还多5.5千克，乙正好买了其中的一半，这筐西瓜共多少千克？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">5.5 / (1/10)</gadget>
<output>55</output>

<result>55</result>