There are 3 pastures, the grass on which grows equally densely and equally fast, and its area is 4 mu, 8 mu and 10 mu. 24 cows eat the grass on the first pasture in 6 weeks; 36 cows eat the grass on the second pasture in 12 weeks, how many cows can eat the grass on the second pasture in 9 weeks.
有3片牧场，场上的草长得一样密，而且长得一样快，它的面积为4亩、8亩和10亩．24头牛6星期吃完第一片牧场上的草；36头牛12星期吃完第二片牧场上的草，多少头牛9星期才能吃完第二片牧牧场上的草．
<gadget id="calculator">6 / 8</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">48 * (3/4)</gadget>
<output>36</output>

<gadget id="calculator">36 * 12</gadget>
<output>432</output>

<gadget id="calculator">48 * 6</gadget>
<output>288</output>

<gadget id="calculator">432 - 288</gadget>
<output>144</output>

<gadget id="calculator">12 - 6</gadget>
<output>6</output>

<gadget id="calculator">144 / 6 / 8</gadget>
<output>3</output>

<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<gadget id="calculator">36 - 18</gadget>
<output>18</output>

<gadget id="calculator">18 * 8</gadget>
<output>144</output>

<gadget id="calculator">3 * 9 * 8</gadget>
<output>216</output>

<gadget id="calculator">144 + 216</gadget>
<output>360</output>

<gadget id="calculator">360 / 9</gadget>
<output>40</output>

<result>40</result>