Stacking 6 copies of the same "Ci Hai" together has a thickness of 168 mm, and how many copies of this "Ci Hai" can reach 700 mm.
将6本相同的《辞海》堆叠在一起厚168毫米，至少多少本这样的《辞海》才能达到700毫米．
<gadget id="calculator">168 / 6</gadget>
<output>28</output>

<gadget id="calculator">700 / 28</gadget>
<output>25</output>

<result>25</result>