I am currently doing economics homework and am a bit confused. I need to find the MRTS for the function q= 4L^0.75 K^0.

I am currently doing economics homework and am a bit confused. I need to find the MRTS for the function q= 4L^0.75 K^0.25. (L= labor, K = Capital) L=10 , K= 20

because there is a whole number in front of "L" can you use the Cobb-Douglas shortcut. If so please show me how I would do this. I know if the function was q= L^0.75 K^0.25 the answer would be MRTS = 1.5 K/L. Any help would be very appreciated! I am stuck on this one thing and it is upholding me a great deal/