No problem, we've got 15725555 and 42711075 to multiply
15725555 × 42711075 = 42711075 × (15725555)
+ 42711075 × 5 giving us 213555375
+ 42711075 × 50 which equals 2135553750
+ 42711075 × 500 that equals 21355537500
+ 42711075 × 5000 resulting in 213555375000
+ 42711075 × 20000 that equals 854221500000
+ 42711075 × 700000 that is equal 29897752500000
+ 42711075 × 5000000 resulting in 213555375000000
+ 42711075 × 10000000 what gives us 427110750000000

= 671655359021625
