Light from two laser pointers with wavelengths 630 nm (red light) and 470 m (blue light) is incident on a diffraction grating with a slit

Light from two laser pointers with wavelengths 630 nm (red light) and 470 μm (blue light) is incident on a diffraction grating with a slit spacing of 10 mm, and the diffracted light illuminates a screen 2.2 m away. What is the distance on the screen between the first red fringe and the first blue fringe?