Divide the following:

4d9m6.10d9m6
------------
2d9m9

To divide the given numbers:

Step 1: Remove the decimal points by multiplying both the numerator and denominator by 100.

4d9m6.10d9m6 becomes 4096.1096
2d9m9 becomes 209

Step 2: Perform the division.

4096.1096 ÷ 209

To perform this division, you can use a calculator or follow these manual steps:

1. Start by dividing the whole numbers: 4096 ÷ 209 = 19 (quotient)
2. Bring down the decimal point in the quotient.
3. Perform the division for the decimal part by adding zeros as necessary to the dividend until you reach the desired precision or have a repeating pattern.

4096.1096 ÷ 209 = 19.5985 (rounded to four decimal places)

So, the division of 4d9m6.10d9m6 by 2d9m9 is approximately 19.5985.