A barrel of oil weighs 15 kilograms, which happens to be 3/5. How many kilograms does this barrel of oil weigh?
一桶油，吃了15千克，正好吃了它的(3/5)，这桶油重多少千克．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 / (3/5)</gadget>
<output>25</output>

<result>25</result>