Alright, let's work through 21234960 times 90308238 step by step
21234960 × 90308238 = 90308238 × (21234960)
+ 90308238 × 0 what gives us 0
+ 90308238 × 60 what gives us 5418494280
+ 90308238 × 900 resulting in 81277414200
+ 90308238 × 4000 that is equal 361232952000
+ 90308238 × 30000 which equals 2709247140000
+ 90308238 × 200000 that results in 18061647600000
+ 90308238 × 1000000 that is equal 90308238000000
+ 90308238 × 20000000 that equals 1806164760000000

= 1917691821600480
