For a barrel of soybean oil, 12 kilograms are poured out for the first time, and 15 kilograms are poured out for the second time, and the whole barrel (5/8) is left. What is the mass of this barrel of soybean oil in kilograms?
一桶大豆油，第一次倒出12千克，第二次倒15千克，还剩全桶的(5/8)，这桶大豆油的质量是多少千克？
<gadget id="calculator">12 + 15</gadget>
<output>27</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">27 / (3/8)</gadget>
<output>72</output>

<result>72</result>