A certain car runs 100 kilometers and uses about 10 liters of oil. If it is about 4,000 kilometers from place A to place B, how many liters of oil will be used?
某种汽车行驶100千米，大约用油10升．如果从甲地到乙地大约有4000千米，算一下，大约要用油多少升？
<gadget id="calculator">4_000 / 100</gadget>
<output>40</output>

<gadget id="calculator">40 * 10</gadget>
<output>400</output>

<result>400</result>