8086 asm help needed

Hey guys, I've a lab exam on wenesday in assembly language programming. Our lecturer gave us a program to practise with, but I just can't get it. I've been trying for a good hour and a half, and nothing is working. Can anybody help me with this problem:-

Write an 8086 assembly language program that will compute:

2.0 * log10 X for x = 0.1, 1.0, 10.0, 100.5, 1000.0, and six other values using a loop.

All values are in the single-precision (short real) format