There are three barrels of oil, 45 kg each. The first bucket uses as much as the second bucket, and the third bucket uses (2/5). How many kilograms did the three barrels of oil share?
有三桶油，每桶45千克．第一桶用去的和第二桶剩下的同样多，第三桶用去(2/5)．这三桶油共用去多少千克？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">45 * (2/5)</gadget>
<output>18</output>

<gadget id="calculator">45 + 18</gadget>
<output>63</output>

<result>63</result>