It takes Xiao Ming 42 seconds to climb from the first floor to the third floor. If the climbing speed is the same, how long does it take him to climb from the first floor to the sixth floor?
小明从一楼爬到三楼需用时42秒，如果爬楼速度相同，那么他从一楼爬到六楼需要多少时间？
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">42 / 2</gadget>
<output>21</output>

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

<gadget id="calculator">21 * 5</gadget>
<output>105</output>

<result>105</result>