The clock strikes 3 times at 3 o'clock, 4 times at 4 o'clock, 4 seconds for 3 times at 3 o'clock, 6 seconds for 4 times at 4 o'clock, then 10 times at 10 o'clock, How many seconds did it take.
时钟3点钟敲了3下，4点钟敲了4下，3点钟敲3下用了4秒钟，4点钟敲4下，用了6秒钟，那么10点钟敲10下，用了多少秒钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

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

<result>18</result>