Someone goes to work on the tenth floor of a ten-story building, and it takes 64 seconds for him to go from the first floor to the fifth floor. Then how many seconds will it take to go up to the tenth floor at the same speed?
某人到十层大楼的第十层办事，他从一层到第五层用64秒，那么以同样的速度往上走到第十层，还需要多少秒才能到达．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<gadget id="calculator">10 - 5</gadget>
<output>5</output>

<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<result>80</result>