Alright, let's work through 42435997 times 29642291 step by step
42435997 × 29642291 = 29642291 × (42435997)
+ 29642291 × 7 giving us 207496037
+ 29642291 × 90 that is equal 2667806190
+ 29642291 × 900 what gives us 26678061900
+ 29642291 × 5000 resulting in 148211455000
+ 29642291 × 30000 resulting in 889268730000
+ 29642291 × 400000 that results in 11856916400000
+ 29642291 × 2000000 what gives us 59284582000000
+ 29642291 × 40000000 resulting in 1185691640000000

= 1257900171949127
