Alright, let's work through 31373873 times 85689272 step by step
31373873 × 85689272 = 85689272 × (31373873)
+ 85689272 × 3 that equals 257067816
+ 85689272 × 70 which equals 5998249040
+ 85689272 × 800 that is equal 68551417600
+ 85689272 × 3000 which equals 257067816000
+ 85689272 × 70000 giving us 5998249040000
+ 85689272 × 300000 what gives us 25706781600000
+ 85689272 × 1000000 which equals 85689272000000
+ 85689272 × 30000000 which equals 2570678160000000

= 2688404337190456
