There is a piece of pasture on the pasture, which can feed 23 cows in 5 weeks and 17 cows in 10 weeks. Assuming that the growth rate of the grass remains constant, how many weeks can the pasture last for 16 cows?
牧场上有一片牧草，供23头牛5周吃完，供17头牛10周吃完，假定草的生长速度不变，则该牧场可供16头牛吃多少周．
<gadget id="calculator">23 * 5</gadget>
<output>115</output>

<gadget id="calculator">17 * 10</gadget>
<output>170</output>

<gadget id="calculator">170 - 115</gadget>
<output>55</output>

<gadget id="calculator">10 - 5</gadget>
<output>5</output>

<gadget id="calculator">55 / 5</gadget>
<output>11</output>

<gadget id="calculator">5 * 11</gadget>
<output>55</output>

<gadget id="calculator">115 - 55</gadget>
<output>60</output>

<gadget id="calculator">16 - 11</gadget>
<output>5</output>

<gadget id="calculator">60 / 5</gadget>
<output>12</output>

<result>12</result>