After half of a barrel of oil is poured out, then the remaining half is poured out. At this time, there is still 16kg in the barrel, and the known weight of the barrel is 5.5kg. So how many kilograms does the barrel of oil weigh in total?
一桶油倒去一半后，再倒去剩下的一半，这时连桶还有16kg，已知桶重5.5kg，那么原来这桶油连桶共重多少千克？
<gadget id="calculator">16 - 5.5</gadget>
<output>10.5</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">10.5 / (1/4)</gadget>
<output>42</output>

<gadget id="calculator">42 + 5.5</gadget>
<output>47.5</output>

<result>47.5</result>