Teacher Liu's motorcycle used to consume 2.4 liters of fuel per 100 kilometers, but after replacing it with an innovative engine, it saves 0.4 liters of fuel per 100 kilometers. How many more kilometers can you drive with the oil used for driving 500 kilometers in the past?
刘老师的摩托车原来行驶100千米耗油2.4升，换上革新发动机后，每100千米省油0.4升．原来行驶500千米路用的油，现在可以多行驶多少千米？
<gadget id="calculator">500 / 100</gadget>
<output>5</output>

<gadget id="calculator">5 * 0.4</gadget>
<output>2</output>

<gadget id="calculator">2.4 - 0.4</gadget>
<output>2</output>

<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">2 / (1/50)</gadget>
<output>100</output>

<result>100</result>