No problem, we've got 72252224 and 64270421 to multiply
72252224 × 64270421 = 64270421 × (72252224)
+ 64270421 × 4 that is equal 257081684
+ 64270421 × 20 giving us 1285408420
+ 64270421 × 200 giving us 12854084200
+ 64270421 × 2000 that results in 128540842000
+ 64270421 × 50000 resulting in 3213521050000
+ 64270421 × 200000 what gives us 12854084200000
+ 64270421 × 2000000 resulting in 128540842000000
+ 64270421 × 70000000 which equals 4498929470000000

= 4643680854666304
