Hello from MrBillDoesMath!
Answer: 1400 days
Discussion:
Let "d" be the number of days. Then
4% * d = 56
Write 4% as 4/100
(4/100) d = 56.
Multiple both sides by 100
4d = 5600
Divide both sides by 4
4 * (1/4) d = 5600/ 4 = 1400 =>
d = 1400 days
Thank you,
MrB