The grass on the pasture grows at a uniform rate every day. If the grass on the pasture can feed 17 cows for 30 days, or 19 cows for 24 days. Now 36 cows have been eaten for 2 days, how many more cows have been added, and then all the grass has been eaten in 6 days, how many more cows have been added?
牧场上的草每天以均匀的速度生长，如果牧场上的草可供17头牛吃30天，或可供19头牛吃24天．现有36头牛吃2天后，又增加了几头牛，再用6天吃光所有的草，问增加了几头牛？
<gadget id="calculator">17 * 30</gadget>
<output>510</output>

<gadget id="calculator">19 * 24</gadget>
<output>456</output>

<gadget id="calculator">510 - 456</gadget>
<output>54</output>

<gadget id="calculator">30 - 24</gadget>
<output>6</output>

<gadget id="calculator">54 / 6</gadget>
<output>9</output>

<gadget id="calculator">17 - 9</gadget>
<output>8</output>

<gadget id="calculator">8 * 30</gadget>
<output>240</output>

<gadget id="calculator">36 - 9</gadget>
<output>27</output>

<gadget id="calculator">27 * 2</gadget>
<output>54</output>

<gadget id="calculator">240 - 54</gadget>
<output>186</output>

<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<gadget id="calculator">36 * 6</gadget>
<output>216</output>

<gadget id="calculator">54 - 216</gadget>
<output>-162</output>

<gadget id="calculator">186 + (-162)</gadget>
<output>24</output>

<gadget id="calculator">24 / 1</gadget>
<output>24</output>

<result>24</result>