Two barrels of oil, A and B, weigh 200 kilograms in total. If one-fifth of the oil in barrel A is poured into barrel B, the weight ratio of the two barrels of oil is 3:2. How much does oil in barrel A weigh?
甲、乙两桶油共重200千克，若把甲桶中油的(1/5)倒入乙桶，则两桶油的重量比是3：2，甲桶油原来重多少千克？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(3/5) / (4/5)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">200 * (3/4)</gadget>
<output>150</output>

<result>150</result>