No problem, we've got 40075315 and 20745913 to multiply
40075315 × 20745913 = 20745913 × (40075315)
+ 20745913 × 5 giving us 103729565
+ 20745913 × 10 that equals 207459130
+ 20745913 × 300 that is equal 6223773900
+ 20745913 × 5000 that is equal 103729565000
+ 20745913 × 70000 which equals 1452213910000
+ 20745913 × 000000 which equals 0
+ 20745913 × 0000000 resulting in 0
+ 20745913 × 40000000 that results in 829836520000000

= 831398998437595
