It takes Xiaofang 20 seconds to go from the first floor to the second floor. At this speed, how many seconds does it take her to go from the second floor to the seventh floor?
小方从一楼到二楼要花20秒钟，照这样的速度，她从二楼到七楼需要花多少秒钟．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">7 - 2</gadget>
<output>5</output>

<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<result>100</result>