Alright, let's work through 20977954 times 63923738 step by step
20977954 × 63923738 = 63923738 × (20977954)
+ 63923738 × 4 giving us 255694952
+ 63923738 × 50 giving us 3196186900
+ 63923738 × 900 that is equal 57531364200
+ 63923738 × 7000 giving us 447466166000
+ 63923738 × 70000 that results in 4474661660000
+ 63923738 × 900000 that results in 57531364200000
+ 63923738 × 0000000 that is equal 0
+ 63923738 × 20000000 what gives us 1278474760000000

= 1340989235272052
