There are 178 books in the bookstore, 64 of which have been sold. The remaining books are going to be sold out within 6 days, how many books are sold per day on average?
书店里有178本书，已经卖出去64本．剩下的书准备在6天内卖完，平均每天卖多少本书？
<gadget id="calculator">178 - 64</gadget>
<output>114</output>

<gadget id="calculator">114 / 6</gadget>
<output>19</output>

<result>19</result>