No problem, we've got 77886341 and 21412058 to multiply
77886341 × 21412058 = 21412058 × (77886341)
+ 21412058 × 1 what gives us 21412058
+ 21412058 × 40 that equals 856482320
+ 21412058 × 300 that is equal 6423617400
+ 21412058 × 6000 resulting in 128472348000
+ 21412058 × 80000 giving us 1712964640000
+ 21412058 × 800000 producing 17129646400000
+ 21412058 × 7000000 that equals 149884406000000
+ 21412058 × 70000000 that is equal 1498844060000000

= 1667706850899778
