Two barrels of oil, A and B, weigh 160 kilograms in total. If (7/15) is taken out from barrel A and poured into barrel B, then barrel A is 40 kilograms less than barrel B. How many kilograms of original oil is in barrel A?
甲乙两桶油共重160千克，如果从甲桶中取出(7/15)倒入乙桶，那么甲桶就比乙桶少40千克．甲桶原有油多少千克？
<gadget id="calculator">160 - 40</gadget>
<output>120</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">1 - (7/15)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">120 / 2 / (8/15)</gadget>
<output>225/2 = around 112.5</output>

<result>225/2 = around 112.5</result>