The number is
This is a question dealing with place values of numbers.
Numbers are written with digits in the order:
With H indicating the number of hundreds
T indicates the number of tens
U indicates the number of units or 'ones'.
Janie's number has:
8 ones, or 8 units, so in the units place, write
9 tens, so in the tens place, write
9 hundreds, so in the hundreds place, write
(the number of hundreds is the same as the tens)