Sagot :
The smallest 10 digit number is 1000000000
so
1000000000-1999999
=998000001
so
1000000000-1999999
=998000001
Number which is 1,999,999 less than smallest 10 digit number means that -
Smallest 10-digit number - 1,999,999
1,000,000,000 - 1999,999 = 998000001
Smallest 10-digit number - 1,999,999
1,000,000,000 - 1999,999 = 998000001