A certain engineering team repaired a section of road, originally planned to repair 40 kilometers per day, but actually repaired 10 kilometers more per day, so that the repair was completed 2 days earlier than the original plan. How many kilometers is this road?
某工程队修一段公路，原计划每天修40千米，实际每天多修10千米，这样比原计划提前2天修完．这段公路长多少千米？
<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">10 - 40</gadget>
<output>-30</output>

<gadget id="calculator">40 + (-30)</gadget>
<output>10</output>

<gadget id="calculator">100 / 10 / 1_000</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">40 * (1/100)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>