There are 17 cubic meters of water in a water tank, 3 cubic meters are used for the first time, the ratio of water used for the second and third times is 4:3, the third time is just used up, how many cubic meters are used for the third time ?
一个水箱里水有17立方米，第一次用去了3立方米，第二次和第三次用去水量的比是4：3，三次正好用完，第三次用去了多少立方米？
<gadget id="calculator">17 - 3</gadget>
<output>14</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">14 * (3/7)</gadget>
<output>6</output>

<result>6</result>