Dongdongjia used 24 tons of water in May last year, and saved (1/6) this May compared with last May. How many tons of water was saved in May this year compared to last year?
东东家去年五月份用水24吨，今年五月份比去年五月份节约(1/6)，今年五月份比去年节约用水多少吨？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">24 * (1/6)</gadget>
<output>4</output>

<result>4</result>