There is a barrel of oil, all (3/4) has been used up, and there are 48 kilograms left in the barrel. How much does this barrel of oil weigh?
有一桶油，已经用去了全部的(3/4)，桶里还剩48千克．这桶油重多少千克．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">48 / (1/4)</gadget>
<output>192</output>

<result>192</result>