After the passenger transport company installed fuel-saving equipment for each vehicle, the 4 small passenger cars saved 176.4 liters of fuel for one week (7 days). How many liters of fuel is saved per day per small passenger car on average?
客运公司为每辆车安装了节油设备后，4辆小型客车一周(7天)节约用油176.4升．平均每辆小型客车每天节约用油多少升？
<gadget id="calculator">176.4 / 7 / 4</gadget>
<output>6.3</output>

<result>6.3</result>