A barrel of gasoline, the first time to take out (1/5), the second time to take out 25% more than the first 22.5 kilograms, two times just finished. How many kilograms does this barrel of gasoline weigh?
一桶汽油，第一次取出(1/5)，第二次取出的比第一次的25%还多22.5千克，两次正好取完．这桶汽油重多少千克？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/5) * (1/4)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/5) - (1/20)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">22.5 / (3/4)</gadget>
<output>30</output>

<result>30</result>