Alright, let's work through 74290818 times 63780486 step by step
74290818 × 63780486 = 63780486 × (74290818)
+ 63780486 × 8 yielding 510243888
+ 63780486 × 10 what gives us 637804860
+ 63780486 × 800 resulting in 51024388800
+ 63780486 × 0000 that equals 0
+ 63780486 × 90000 that is equal 5740243740000
+ 63780486 × 200000 yielding 12756097200000
+ 63780486 × 4000000 that equals 255121944000000
+ 63780486 × 70000000 producing 4464634020000000

= 4738304477377548
