It took Mr. Zhang 8 seconds to walk from the first floor to the second floor. How many seconds did it take to walk to the eighth floor at this speed?
张老师从一楼走到二楼用了8秒，照这样的速度走到八楼，共用多少秒．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">8 / 1</gadget>
<output>8</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<result>56</result>