Alright, let's work through 77913364 times 90340943 step by step
77913364 × 90340943 = 90340943 × (77913364)
+ 90340943 × 4 giving us 361363772
+ 90340943 × 60 resulting in 5420456580
+ 90340943 × 300 that equals 27102282900
+ 90340943 × 3000 that results in 271022829000
+ 90340943 × 10000 that equals 903409430000
+ 90340943 × 900000 what gives us 81306848700000
+ 90340943 × 7000000 yielding 632386601000000
+ 90340943 × 70000000 that equals 6323866010000000

= 7038766776062252
