Tong Tong’s 50-meter run was 8.47 seconds, and Lili’s 50-meter run was 9.38 seconds. Which one of the two ran faster? How many seconds faster?
童彤50米跑的成绩是8.47秒，丽丽跑50米用了9.38秒，两个人谁跑的快，快多少秒？
<gadget id="calculator">9.38 - 8.47</gadget>
<output>0.91</output>

<result>0.91</result>