Master Zhang needs to repair 100 stools, 36 of which have already been repaired, and the remaining 16 stools are repaired every hour. How many hours will it take to finish?
张师傅要修100条凳子，已经修好了36条，剩下的每小时修16条，还要几小时才能修完？
<gadget id="calculator">100 - 36</gadget>
<output>64</output>

<gadget id="calculator">64 / 16</gadget>
<output>4</output>

<result>4</result>