The breeder's uncle prepared 900 kilograms of food for the panda "Doudou", and Doudou can eat 36 kilograms per day. After a period of time, there were still 360 kilograms of food left uneaten. Please do the math, how many days have passed? (Solved in two ways)
饲养员叔叔给熊猫"豆豆"准备了900千克食物，豆豆每天能吃36千克．过了一段时间后，还剩下360千克食物没有吃．请你算一算，过的这段时间是几天？(用两种方法解决)
<gadget id="calculator">900 / 36</gadget>
<output>25</output>

<gadget id="calculator">360 / 36</gadget>
<output>10</output>

<gadget id="calculator">25 - 10</gadget>
<output>15</output>

<result>15</result>