Dad practices swimming. The lane is 50 meters long. He insists on swimming 8 rounds every day. How many meters does he swim every day?
爸爸练习游泳，泳道长50米，他每天坚持游8个来回，每天游多少米？
<gadget id="calculator">50 * 2 * 8</gadget>
<output>800</output>

<result>800</result>