Alright, let's work through 39678414 times 46465398 step by step
39678414 × 46465398 = 46465398 × (39678414)
+ 46465398 × 4 giving us 185861592
+ 46465398 × 10 what gives us 464653980
+ 46465398 × 400 resulting in 18586159200
+ 46465398 × 8000 which equals 371723184000
+ 46465398 × 70000 that is equal 3252577860000
+ 46465398 × 600000 that results in 27879238800000
+ 46465398 × 9000000 what gives us 418188582000000
+ 46465398 × 30000000 that equals 1393961940000000

= 1843673298518772
