879,980,000 -20,020,000

879,999,990 -20,000,010

879,989,997 -20,010,003

3

900,000,000 -935,000,000

900,000,000 -935,000,000

900,000,000 -17,500,000

3 +1

1,835,000,000

1,835,000,000

917,500,000

2