The cost of the paint was $39 per gallon, so if the cost is $4,368, how many gallons did you buy?
$39 per gallon
$4,368 = cost of total
Divide ⇒ 4368 : 39
4368 = 112
39
Solution: 112 gallons.
Cost of total divided by cost per gallon
$4,368/$39=112
112 Gallons bought