A bucket of pure water is 18 liters, which is just enough for four people in Xiaohua's family to drink for three days. How many liters of water does the average person drink per day?
一桶纯净水18升，正好够小华家4口人喝3天．平均每人每天喝多少升水？
<gadget id="calculator">18 / 3 / 4</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>