Mantissa part 27. If you need a more precise answer use a calculator or another method rather than log tables. So log 28725 0 045827 045827.
By exploring the values given in the tables you can better understand how logs work.
Fx log a x. In mathematics the log is the inverse operation to exponentiation just as division is the inverse of multiplicat. This is simply because 238. 93602154 3560 5361 Presumably for convenience of presentation the values are given for a base distance of 10000000000 units.