Alright, let's work through 6546673 times 86704266 step by step
6546673 × 86704266 = 86704266 × (6546673)
+ 86704266 × 3 what gives us 260112798
+ 86704266 × 70 giving us 6069298620
+ 86704266 × 600 which equals 52022559600
+ 86704266 × 6000 that equals 520225596000
+ 86704266 × 40000 which equals 3468170640000
+ 86704266 × 500000 yielding 43352133000000
+ 86704266 × 6000000 yielding 520225596000000

= 567624477207018
