Just add them up:
200000 + 10000 + 9000 + 53 = 219053.
10000
9000
9000
90%
90%
Then answer to your question is: 530219046
200000+50000+9000+300+40+1
700000+10000+9000+300+40+3
10000
10000
9000
there are 10 palindromic numbers between 9000 and 10000 9009,9119,9229,9339,9449,9559,9669,9779,9889,9999
9000
Oh jeez. 10000000+2000000+400000+10000+9000+200+90+3
10000
10,000 ten thousand
90%