No problem, we've got 77800444 and 50080815 to multiply
77800444 × 50080815 = 50080815 × (77800444)
+ 50080815 × 4 what gives us 200323260
+ 50080815 × 40 that results in 2003232600
+ 50080815 × 400 that results in 20032326000
+ 50080815 × 0000 that equals 0
+ 50080815 × 00000 that results in 0
+ 50080815 × 800000 that equals 40064652000000
+ 50080815 × 7000000 what gives us 350565705000000
+ 50080815 × 70000000 yielding 3505657050000000

= 3896309642881860
