It took Xiaolan 6 minutes to climb from the first floor to the third floor. According to this calculation, how many minutes did it take her to climb from the first floor to the fourth floor?
小兰从一楼爬到三楼用了6分钟，照这样算，她从一楼爬到四楼用多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>