A car originally used 12 liters of gasoline per hour, but the fuel consumption has been saved by 10% after repairs. Now how many liters of gasoline does the car use per hour?
一辆汽车原来每小时用去汽油12升，修理后用油节约了10%，现在这辆汽车每小时用去汽油多少升？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">12 * (9/10)</gadget>
<output>54/5 = around 10.8</output>

<result>54/5 = around 10.8</result>