It takes Xiaohong 20 seconds to go from the first floor to the third floor. How many seconds does it take to go from the first floor to the sixth floor at the same speed?
小红从一楼到三楼需20秒，用同样的速度，从一楼到六楼需多少秒．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<result>50</result>