A bucket of water together with the bucket weighs 17.5 kg. After pouring out (1/3) of the water, it weighs 12 kg. What is the weight of the empty bucket?
一桶水连桶共重17.5千克，把水倒出(1/3)后，重12千克，空桶重多少千克．
<gadget id="calculator">17.5 - 12</gadget>
<output>5.5</output>

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

<gadget id="calculator">5.5 / (1/3)</gadget>
<output>16.5</output>

<gadget id="calculator">17.5 - 16.5</gadget>
<output>1</output>

<result>1</result>