Alright, let's work through 36642341 times 18117807 step by step
36642341 × 18117807 = 18117807 × (36642341)
+ 18117807 × 1 yielding 18117807
+ 18117807 × 40 that equals 724712280
+ 18117807 × 300 that is equal 5435342100
+ 18117807 × 2000 that results in 36235614000
+ 18117807 × 40000 resulting in 724712280000
+ 18117807 × 600000 that is equal 10870684200000
+ 18117807 × 6000000 that equals 108706842000000
+ 18117807 × 30000000 what gives us 543534210000000

= 663878862266187
