12.56
To find the circumference of a circle, the formula is diameter • π. The diameter is twice the radius, so first you must multiply 2 • 2 = 4. So the diameter is 4.
The question states to use 3.14 instead of π, so from here we multiply 4, the diameter, by 3.14 to find the circumference.
4 • 3.14 = 12.56, so the circumference is 12.56
