Alright, let's work through 61107478 times 10298971 step by step
61107478 × 10298971 = 10298971 × (61107478)
+ 10298971 × 8 that is equal 82391768
+ 10298971 × 70 that equals 720927970
+ 10298971 × 400 which equals 4119588400
+ 10298971 × 7000 resulting in 72092797000
+ 10298971 × 00000 that results in 0
+ 10298971 × 100000 what gives us 1029897100000
+ 10298971 × 1000000 yielding 10298971000000
+ 10298971 × 60000000 which equals 617938260000000

= 629344143805138
