Xiao Ming went skiing, and it took 7 minutes to take the cable car up the mountain, and the cable car traveled 200 meters per minute. It took 20 minutes to ski down the mountain, 90 meters per minute. How many meters does Xiao Ming go skiing than taking the cable car?
小明去滑雪，上山乘缆车用了7分钟，缆车每分钟行200米．下山滑雪用了20分钟，每分钟行90米．小明滑雪比乘缆车多行多少米？
<gadget id="calculator">90 * 20</gadget>
<output>1_800</output>

<gadget id="calculator">200 * 7</gadget>
<output>1_400</output>

<gadget id="calculator">1_800 - 1_400</gadget>
<output>400</output>

<result>400</result>