The engineering team builds a road, and plans to build 100 meters per day, which will be completed in 40 days. In fact, 800 meters were repaired in 2 days. At this speed, how many days can it be completed?
工程队修一条公路，计划每天修100米，40天完成．实际2天就修了800米，照这样的速度，多少天可以完成？
<gadget id="calculator">800 / 2</gadget>
<output>400</output>

<gadget id="calculator">40 / 400</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">100 * (1/10)</gadget>
<output>10</output>

<result>10</result>