barrel of oil, pour out (1/3) for the first time, pour out 5 kg more than the first time for the second time, and there are 25 kg left, how much does this barrel of oil weigh?
一桶油，第一次倒出(1/3)，第二次倒出比第一次多5千克，还剩下25千克，这桶油重多少千克？
<gadget id="calculator">25 + 5</gadget>
<output>30</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3) - (1/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">30 / (1/3)</gadget>
<output>90</output>

<result>90</result>