What is 4 square root of 240 divided by 4 square root of 15?

$$\\4\sqrt{240}\div4\sqrt{15}\\\\ =\frac{4\sqrt{240}}{4\sqrt{15}}\\\\ =\frac{\sqrt{4*60}}{\sqrt{15}}\\\\ =\frac{\sqrt{4*4*15}}{\sqrt{15}}\\\\ =\frac{4\sqrt{15}}{\sqrt{15}}\\\\ =4$$