Aunt Wang is going to sew 320 pieces of cotton padded clothes for the people in the disaster area to spend the winter. 140 pieces have been sewn, and the rest will be finished within 4 days. How many coats do you sew on average every day?
王阿姨要缝320件棉衣送给灾区群众过冬，已经缝好了140件，剩下的要在4天内完成．平均每天缝棉衣多少件？
<gadget id="calculator">320 - 140</gadget>
<output>180</output>

<gadget id="calculator">180 / 4</gadget>
<output>45</output>

<result>45</result>