The clock at Xiaoli's house rings 4 times at 4 o'clock, and it takes 6 seconds to finish the ringing, and how many seconds does it take to ring 10 times at 10 o'clock.
小丽家里的座钟4时敲响4下，6秒钟敲完，10时敲10下，需要多少秒．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

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

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

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<result>18</result>