Alright, let's work through 66878571 times 18288340 step by step
66878571 × 18288340 = 18288340 × (66878571)
+ 18288340 × 1 what gives us 18288340
+ 18288340 × 70 that is equal 1280183800
+ 18288340 × 500 which equals 9144170000
+ 18288340 × 8000 that results in 146306720000
+ 18288340 × 70000 resulting in 1280183800000
+ 18288340 × 800000 resulting in 14630672000000
+ 18288340 × 6000000 which equals 109730040000000
+ 18288340 × 60000000 giving us 1097300400000000

= 1223098045162140
