No problem, we've got 64703875 and 83473830 to multiply
64703875 × 83473830 = 83473830 × (64703875)
+ 83473830 × 5 which equals 417369150
+ 83473830 × 70 what gives us 5843168100
+ 83473830 × 800 yielding 66779064000
+ 83473830 × 3000 that is equal 250421490000
+ 83473830 × 00000 giving us 0
+ 83473830 × 700000 giving us 58431681000000
+ 83473830 × 4000000 which equals 333895320000000
+ 83473830 × 60000000 that is equal 5008429800000000

= 5401080262091250
