For two barrels of oil, the weight of the first barrel is 3/4 of that of the second barrel. If 6 kg is taken from the second barrel and poured into the first barrel, then the weight of the two barrels of oil is the same. How many kilograms is the second barrel originally?
两桶油，第一桶的重量是第二桶的(3/4)，如果从第二桶取6千克倒入第一桶，那么两桶油就一样重．第二桶原有多少千克？
<gadget id="calculator">1 + 1</gadget>
<output>2</output>

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

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(1/2) - (3/7)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">6 / (1/14)</gadget>
<output>84</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">84 * (4/7)</gadget>
<output>48</output>

<result>48</result>