Mingming went to the swimming pool to swim. He swam 4 rounds in the swimming lane, and swam a total of 800 meters. How long is the swimming lane in this swimming pool?
明明去游泳池游泳，他在泳道内游了4个来回，共游了800米，这个游泳池的泳道有多长？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">800 / 8</gadget>
<output>100</output>

<result>100</result>