Jesse bought a $340$ -gram bag of coffee beans. He uses $18.75$ grams of coffee beans each day. When there are $40$ grams of coffee beans remaining in the bag, Jesse will buy another bag to make sure he doesn't run out of coffee.

Part A
Use the drop-down menus below to create an equation that represents the situation, in which $d$ represents the number of days until Jesse buys another bag of coffee beans.
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Question 2
Part B
How many days can he use the $340$ -gram bag of coffee beans before he buys a new bag?