A fruit farmer plans to plant 252 apple trees, and 56 trees are planted in the first two days. At this rate, how many days will it take to plant the remaining trees?
一户果农，计划种植252棵苹果树，头两天植树56棵，照这种速度，剩下的树还要多少天才能植完？
<gadget id="calculator">252 - 56</gadget>
<output>196</output>

<gadget id="calculator">56 / 2</gadget>
<output>28</output>

<gadget id="calculator">196 / 28</gadget>
<output>7</output>

<result>7</result>