Alright, let's work through 91685754 times 45217520 step by step
91685754 × 45217520 = 45217520 × (91685754)
+ 45217520 × 4 yielding 180870080
+ 45217520 × 50 giving us 2260876000
+ 45217520 × 700 that is equal 31652264000
+ 45217520 × 5000 producing 226087600000
+ 45217520 × 80000 that equals 3617401600000
+ 45217520 × 600000 which equals 27130512000000
+ 45217520 × 1000000 yielding 45217520000000
+ 45217520 × 90000000 giving us 4069576800000000

= 4145802415210080
