uva11538測資B

Input:
1 1
666 888
9527 2426
2468 9753
88888 777777
111 999999
999999 222
1000000 1000000
0 0

Output:
0
1507499436
378794371202
402857876636
71738988575118056
111036296051912
222146512559374
3333329333334000000